I have two rigs: One is my "little" rig, a Markbass Littlemark II into a Schroeder 1210L. The other is my "big" rig, a Line6 Bass POD Pro XT Live into a Crown K2 into a Schroeder 21012L. If I really need more than that, I can also run my 1210L off the other channel on the K2, and/or mic things and run into the house PA.
I *love* my Line6 stuff. I also have two Line6 Variax 5-string basses (one has a custom neck; the other is stock) and I use them in the studio, too.
Make sure you are using the correct setting depending on whether you're going to a power amp/actual bass amp with bass cab, or into a PA system. If you're going into a PA system (or direct to recording), you want to use the cab & amp modeling features. If you're going into a regular bass amp, you want to switch it over so it's bypassing all the cab & amp models and just doing effects-modeling, otherwise it will sound weird. If you're mixing & matching (going into a power amp, then into bass cabs), you'll have to go in and turn off the cab modeling, while retaining the amp modeling, with the saved settings you're using.
Originally Posted by scottman72
...I have not had much time to tweak this set-up...
That is your problem, IMHO. It takes some time to find your tone with a Line6 unit. Remember, you are mixing and matching dozens of amps and cabs. Not all of them sound good together, and not all of them will sound good with your personal instruments and style. It's like buying the entire bass room at a huge shop and plugging into the first random rig you set eyes upon - not a great way to find your sound.
In my experience, you really need to be familiar with the quirks of the original amps and cabs you're modeling if you want to be able to dive right in and get a good tone. In the same way that someone who's accustomed to playing a Modulus can not pick up a Hofner and sound great right away - you have to change your technique quite a bit; they are totally different animals - you'll just need to spend some time with it. The tone is in there, but you have to know what you're doing, and that takes familiarity, which takes time.
As far as power, that is completely up to your power amp. The Bass POD Pro is just a preamp. Make sure the output is not turned down, but other than that, a GX-3 ought to be sufficient. If that's still not enough, try running your other output through the PA (if you're not doing that already) and using your rig as your stage monitor.
Hope this helps!