Thats not bad for $40, if you saying thats how much you spent for all of those mods. As for your next mod, get a WGA and mapclamp. You will notice a big difference with those 2 mods. Run the WGA @ 17 PSI spike and 15 @ redline and you'll be around 265-270.
I have the Kinetic WGA and it is second to none. I have heard that it holds more boost to redline than the AGP WGA, and I have NO part throttle boost at all. I also know a few guys running a 22-23 psi spike on this same WGA. The best part is that its only around $60-$70 shipped. You can make your own mapclamp. Look in the how to's.