Best overall upgrades-98custom pro ACT

As far as a barrel i always suggest the J&J (my personal favorite) or the Lapco( a close second).  If you want a stock i like the CAR folding stock especially for the looks. If you run a remote though I highly recomend an air thru t stock.  I just picked one up and love it.  it allows you to aim without the mask getting in the way.as far as a hopper an evo, Arc, or cyclone would be good.  If you keep it semi auto i recommend the arc but if you are going to get the egrip or the rt i recommend the cyclone.  if you do get an agitated electro hopper i also recommend the rufus dawg center feed.

if you really want a basic barrel, then the ceramic is good. i have one, like i said before. since you're a mid-back woodsball player 14" should be fine. but for your style as you described, i really suggest the apex. and the G36c stock does look nice

cool. it really is a good barrel. i don't know if you've heard about paint to barrel size, but basically you want to try to find a good size paint to your barrel and stick to it for the best accuracy. take your barrel off and drop a paintball down it, if it goes straight through easily:too small, if it gets a little stuck and it takes a little blow to get it out then you have a good paint to barrel match which will help alot with your accuracy