So after enhancing the stock AK with:
1) Ra-Tech steel trigger parts ($115)
2) Ra-Tech open bolt NPAS valve ($19)
3) Ra-Tech hop-up rubber ($9)
4) Ra-Tech wood handguard ($55)
I can now say that my AK's exceed the standards for what i believe great AK gbbrs should be like, both on a functional and aesthetic level. The only thing I wish that could have been better is the performance on full auto. Full auto is really not usable. This is the trade-off to having a full-travel bolt, which i do appreciate. Fortunately for me, I'm pretty much a semi only player, so this is not a big issue. Besides, the kick on this rifle is enough to render full-auto accuracy pretty much useless unless you are at close range. Rapid semi auto doesn't appear to be an issue.
So there you have it. It takes an additional $200 in upgrades to make a good rifle great. YMMV, but to me it was well worth it....maybe because I truly enjoy getting down and dirty with GBBRs. Perhaps it's just me, but I was never a firm believer in guns that run on batteries....