I can't wait to see your seq. graph. The power IMO is very good for the boost and I'm thinking like others that the package is the key....power is all about how everything works together.
Truthfully though, I'm a little un-impressed with the 4000RPM numbers. My ancient T04-R slug and stock port S5 engine with low comp S4 rotors is cranking about 180whp by that point on wastegate (10psi) vs. your ~135whp. I would HOPE that stock twins, even non-seq, would be packing more punch down low. Thats not to take away from your achievement, that thing has a sexy looking graph. Also to that point though, if you were running 12-14psi non seq. you'd likely be at or surpassing my numbers by 4K.......soooo....
