I just found this and it's an old thread, but I like the simple rules of modern stock class. Pump, 12 gram, and feed limitation. I think it's perfect.
I gave up on paintball when the "arms race" turned into tournament ball.. where you basically burned cash for 10 minutes at a time.
I returned when I saw the fallout from that 10 years later ... woods fields re-opening, and old guns coming back in style, and more fun for each dollar spent. I'm sure the field owners hate it though.. longer games and selling far less paint.