I'll be honest I haven't used any of the DAC you listed. I've only tried SMSL SU-1 LOL.
But from my experience after trying about 10+ different dacs from various types (ESS, AKM, R2R, Multibit, FPGA......etc) at this point I'd say in general resolution is less of a problem now, the bigger issue is more tonal balance / timber / sound signature......etc. Then after that I think "broadly speaking" each technology obviously has its strengths and weaknesses. Like delta sigma (AKM, ESS....etc) is better at detail retrieval and R2R is better at imaging and soundstage (more 3D per say) and Multibit is said to be about middle ground.
The Topping and SMSL dacs you listed are all delta sigma dacs so they're probably good at details but some might complain it might sound more "digital" vs the R2R dacs in similar price range. But again implementation is important so this is just "speaking generally".
Oh so Schiit just announced their Unison USB Multibit DAC Card, so now you can have Modi Multibit 2 level of dac inside your amp. For example you can get Rag 2 + Multibit DAC Card now.
https://www.schiit.com/products/true-multibit-unison-usb-card
I have a Lyr 3 now I wonder if I want to get this to make it a dac/amp combo just for fun LOL.
That being said, I sold my MMB2 and went back to SDAC (AK4452), to me SDAC sounds richer/thicker (MMB2 is more clean) but yes MMB2 has better details. So at this point I would almost say there's no straightforward way to pick dacs anymore LOL. I'm sacrificing certain aspects to gain certain aspects where I value more.
It's like those designer diagram Money x Fast x Good and you can only pick 2 LOL.
Maybe figure out what's most important to you then you can pick the type of dac that suits you more if that makes sense (i.e. do you want clean sound or thick/rich sound also how much you value timber vs detail retrieval.......etc, or if you want more relax/natural sounding or do you want laser to your ears where you can hear the grass grow.....etc).
EDIT1: Forgot to say Topping dacs tend to be quite linear and measure super well, so if you like neutral / super detailed sound then Topping is good choice. I don't like neutral sound so I steer away from Topping dacs LOL, but everyone have different preferences so I can still see the appeal. D90 is probably going to be the most detailed dac ever. SMSL tend to be a bit slightly less analytical than Topping dacs.
EDIT2: If you're worried about shipping/import cost you can always look into Canuck Audio Mart, there are a lot of local deals for cheaper.