No problem Luke, I understand.
I own the 3 headphones that I own for a reason. I like each and every one of them depending on the mood I'm in.
On a late night, where I want my music to be slow and seductive, yet still hit a deep bass, I listen to the HD650 with the La Figaro setup listed above (TS 5998 & RCA 5693)
On a normal day, where I'm not overly excited, but not looking to fall asleep any time soon, I listen to the HE-500 with the same La Figaro setup. This also happens to be my favorite combination, due to its versatile nature as well as the type of music I prefer.
When I'm getting ready to go to the gym and I need to get pumped up, I listen to fast paced music, which works best with the LCD-2 and V200 combo. The LCD-2 with the La Figaro setup did not sound good to my ears. It was listenable with the stock tubes that the La Figaro came with, but it's just so good with the V200.
The HD650 and HE-500 are pretty awesome with the V200 as well, but I prefer the smoother presentation that the La Figaro has to offer for these two headphones, as they are already super smooth by nature.
I've stated this before on another headphone site, but I always see the headphones I own like this:
LCD-2: The Crowd Pleaser headphones. Anyone that comes to your place will most likely be amused by the sound these provide (as well as the unique looks).
HE-500: The typical 'hi-fi' sound. Warm, smooth, with a deep, strong bass. Easy to listen to for countless amounts of hours, though it make take a while for these to feel comfortable to you.
HD650: The HD650 is like that ex-gf that you have fond memories of, and on somedays want to hook up with, but on others you fantasize about someone more exciting.
Long ago, I paired the HD650 with the Burson HA-160D. It was very musical to my ears, though the decay of notes seemed unnaturally short due to the articulation and clarity of the amplifier. I got the LCD-2 next. Within a week paired with the HA-160D... I sold them. I felt like the LCD-2 was overhyped, as I preferred the sound of my HD650 over it when paired with the Burson. Later, I got the HE-500, which sounded more dreadful than the LCD-2 did on the Burson. I felt like voices were overly harsh, and instruments sounded unnaturally sharp, to the point it was ear-piercing even at mid-volume settings. At this point I thought maybe I just wasn't cut out for planar magnetic headphones. This is when I decided to give them another try and switch amps, and hence got the LF339. After this, I absolutely loved the HE-500. I also decided to give the LCD-2s another chance and I'm glad I did.
I use the HRT MSII+ with both of my setups. I find that it is leaps and bounds better than the HA-160D DAC. Not only is it more resolving, but everything just sounds less flat. I did some testing before I sold the HA-160D.
I hope you can draw some conclusions about the headphone and amp pairing that would work best with your preferred sound signature from this post!