Just about everything I shoot, I run a non-stock barrel. The majority of my gear now is Cocker threaded, and I have a nice Freak set that I run on everything. The Angel I just acquired will also run the Freak setup, or a vintage glued-not-screwed (hehe, remember that ad campaign?) Boomstick. On the occassion where I need a bunch of extra range, say for a scenario or big game, I'll run my Apex on my Darq. Firepower AND range.
Heck, some of my guns, I don't even have the stock barrels that came with them. I think I still have a stock tube for my '92 SL-68II, but it's had an Armson on there as long as I've owned it. I don't think I've ever put a single ball through the stock barrel.