Please help my rig

Alright, here's the deal. I am an intermediate level bass player, play gigs (mostly in places with PA's), have unfortunately loud band practice, but still want a nice warm, well rounded sound. My current set up is a Warwick Corvette Standard (w/ active EMG's), QSC 1450rmx amplifier, BBE BMAX pre, and two cabs, a 15" Workingman and Ampeg 410 BLF.

To be strait, I hate my set up. It sounds dry, boring and is NO WHERE NEAR the volume of what i think it should be. It's to the point where my amp is clipping while playing at a semi loud volume with 2 guitarists using 100 watt SS amps and a medium volume drummer. I don't think it's close to the volume I should be at (it's a sizable amp).

So my quest has started, I am not sure whether my pre-amp isn't producing the sound I'm looking for (do I want tube?), I would definately like a new cab (was thinking of an Avatar 410, but worried about volume and sound)....basically right now I plug strait to my pre amp and play, what else can I get to shape my sound?

I know this has probably been pretty confusing, but at leaset TRY and help a fellow player....haha, thanks