Ok, some more progress. I took some time and fixed the gain issue of the 727, just swap out the 560ohm R5 and R6 resistors out for some 200ohm units. Again I was using RN60 pulls so they are way too big for the job...
Now the amp has the same gain as the other Stax amps, sitting at 5 on the dial with my computer source. It does sound rather good with the SR-Omega even if it does bring out their bright nature a little bit once you push the volume. There is no excessive bloom here and it has a lot of control for a commercial amp. Why Stax couldn't just have made it like this in the first place is beyond me...
As for the SRM-300, the LF353 had to go so I installed sockets and OPA2604AP's
Edit: Damnit!!! I forgot to sand the chips...