| Hi Theroan,
Just to comment on both your statements, As you mentioned it's really fantastic in the band situation. I know some fellow TBers have written reviews on them which you can check out, but SWR has that knife through butter effect where with proper EQ, you can make a severely underpowered amp upfront and center with the mix because it can sit so powerfully in the mix. I posted something on this recently in the SWR hate' em love 'em thread i think. I know IvanMike who has been great at reviewing stuff as well supports SWR and feels that it shines best in a band situation. I would agree.
As for your low B inquiry, SWR is known for having a powerful lowend. "more lowend" as they say in their ads i think. For a walnut (laminate maple) bass I have it can acheive an incredible low end. Just stricking the low B or even low F# as i have can be felt (not just heard). And that's at half power with a GK1001. SWR is tinted a little bit in the low mids. The tweeter control is something you can mess around with to find the correct amount of tweeter to sit with your band.
It's an excellent cab and I feel it's underrated here on TB. I like it by itself. Very powerful and easy to move. Fits easily in the back of sedan if needed. But I LOVE it and where it shines, is in a band. It has the sharp blade to cut through if needed, and if not you can have it sit perfectly in the mix and rock everyone's body in on the stage easily even with a low B. I've actually owned 2 G3s. I sold one already which saw the most action. This is my second G3 and i have not played it much since it was the backup full stack option used a few times so it's not even broken in really. But please, feel free to research what others think of it as well. I just know that the low end is not just powerful, it's a presence. Please check it out at any local store if you can. Good luck with any amp searching you may do! Cheers
-Kevin | 
