Anything in particular missing or added that's detracting from your enthusiasm of the T50?
This is why, sadly, I like any Lambda better than any ortho I heard so far, and forget about O2 and Sigma, they are just incredible in this respect. I tend to use orthos now with a lot of grind-core, metal and etc now, that way I don't notice this as much as when I put on Jazz or something with a lot of spacial cues.
T50RP is on par with YH-1 for me, they sound different but in terms of enjoyment are in the same category. I would rank them close to the top of the ortho game. If I were to rank all of orthos I heard it would look something like this:
1) Yamaha YH-100 (FV modded) - just slightly ahead of all others
2) Yamaha YH-1 (ericj modded) / Fostex T50RP (F2D modded)
3) Yamaha YHD-1 (F2D modded) / Yamaha YHE-50A (modded to stereo by dBel84, damped by dBel84 and F2D)
4) Fostex T20v2 (F2D modded) / Fostex T30 (need to mod, but comfort sucks anyway)
5) Yamaha HP-50S
6) Audio-Technica ATH-1
7) Pro 30