Unfortunately only you can really answer this question. It depends on what you're looking for. Are you planning to get something better in the future? Are you hoping to be finished with audio gear soon? Are you the type that is curious about what can be better?
If you want to build a long term chain, Susvara will be a good headphone to use if you will invest in your front end gear. If you'd rather be done, maybe Elite would be a good option with less expensive front end gear. However, it won't match the level of Susvara with a better source/amplifier. There's definitely a lot of amplifiers better than the A90 for the Susvara so there's still a good amount of potential left there. I'm also assuming there should be some potential left on the table with your DAC as well.
Personally, I would opt to sell OG Empyrean and invest that money in a better amplifier and/or DAC than go for Elite since you already have Susvara. I don't think the Elite brings anything better or different enough from the Susvara.
Well, the OG empyrean is still my most favorite HP. You know the soft corner lol. Specially in Metal Genre, it sounds too good imo without ANY FATIGUE with the Alcantara pad and the Meze upgraded silver plated copper cable. As I have spent quite a lot in both of the upgraded cables of Meze, I won't sell it but I also want to try out something new. It doesn't have to be necessarily better. And if it's not superior, it should offer something different than the OG Empyrean and susvara by keeping the extreme comfort of these cans.
I am just curious if I will be able to distinguish the difference in my underpowered susvara vs a susvara with 1500-1600$ Amp-Dac stack "instantly"? I was able to do so when I upgraded from Arya & Focal Clear to Empyrean last year. Also, how does R2R dacs perform with the Susvara? I have 4 purchase options for Dacs(Sorry extremely limited in my country due to availability only 1 Good Audio Store): Cayin iDac 6 MK2, Topping D70S, D90SE and Dena Frips Ares II
I think a better amp to pair with Susvara should bring more in your case. Indeed I found Susvara and OG Empy is very good complement to each other, while the former brings crazy details, soundstage, dynamics and micro-details and the latter give unparalleled musicality, smoothness and foot tapping sound.
Just got the D8000 as well and the quality and quantity of bass, details and dynamics are amazing. But as a whole, Susvara is still noticeable better, providing that it is properly driven.
By foot tapping sound, do you mean the sound of kick-drum and similar stuff? IMO the sound of kickdrums is so much better on the Empyrean (Alcantara pad and the upgraded meze silver plated copper cable). When I upgraded from Hifiman Arya and Focal Clear to the Meze, I was shocked to hear the improvement in the dynamics and extended bass + treble both but the susvara is even better. If I could include the smoothness and bass quantity of the OG Empyrean into the Susvara, it could have been perfect. But we all know that's not possible.
Also, that's a really nice setup. Unfortunately I can't spend more than 800$ behind the amp for susvara. Any suggestions besides the Topping, SingXer stuff?
I would second this, the IHA-6 was indistinguishable to an NCore 252mp speaker amp. At least for my ear, that is. But for the price it is certainly a good place to start.
There is a Kinky amp for sale in the classifieds, I hear that amp has a lot of power. Might want to read up on that and consider it as well.
Actually I have listened to the Susvara on the said cayin Amp and Topping D70S (AKM 4497 based) in the audio store from where I purchased it. It was definitely better than my current setup. Dx7 pro (Dac) + A90. I can't find any amp under 800$ that offers more power than the Cayin without being overly analytical/transparent/clean like the Topping A90. For some reason, I hated how meh the A90 makes even my old Empyrean sound at anything over Low gain. Even the IFI idsd Signature makes the Empyrean OG sound soo much better. On Susvara, the case is quite different with the A90 but still the Cayin sounded better.
As
@driftingbunnies has correctly pointed the logical answer is that since you already own the Susvara to invest in a better amp for them.
Unless you need to simplify your chain and sell everything and be done with Elite and let's say a DX300 with AMP12.
Regarding the IHA6 , I have reviewed it and found it treble forward, a touch bright.
I would suggest to try something like the Flux Labs FA-10.
Well, I have demoed the Cayin as I mentioned in my previous comment but the DAC was D70s from topping. It was certainly warmer sounding than my current topping A90 chain. The topping sounds decent with Susvara but meh with Empyrean OG. So I want to get rid of it with a equally powerful and slightly warm amp. I will also look into the Flux Labs FA-10 later. Thanks