Would you want anymore than that though? How's everything else holding up?
I'm planing on building my motor to handle more but i will run about the same as you purely for a reliability point of view. I can't afford to build it a second time and to replace other parts on a regular basis.
Allot of the guys with the big power builds get their cars de tuned.
Honestly it's more of a "I just want more because I'm bored kind of thing". I'll never use the power or my cars full potential and I'll be the first to acknowledge that. My builds been holding up fine. I burn some oil sometimes but that's normal since I have a loose second ring gap. I just keep an eye on things and go through roughly 1/2-1 quart for every 3k miles. It depends on my driving though.
But yeah I know a few guys that normally run around the mid to low 500s and that's being detuned from higher numbers. I guess I just need my car back and stop reading dyno sheets, haha