I've owned a bass for roughly 3 years but have only played intensely for the past year or so. I'm in a band that gigs about twice-three times a month(bars), and until now I have gotten by borrowing my drummers Westbury combo amp for shows. I have my dinky little Crate starter-off-combo at home . Needless to say I have needed an upgrade for a while. I started the other day by winning a Workingman 4004 on eBay. I was originally going to buy a behringer bx3000t, but decided against it because of my prediciment on cabs. I'm certain I will be purchasing an Avatar cab, but didn't know whether to go b212 or b210, but more importantly 8 ohm or 4 ohm. I'm trying to think down the road for a time when I'll need more power, and I'm thinking whatever cab I buy now I'll just buy the other later. However, at that point, will the 4004 still be useful? If so I'm thinking I'll go 8 ohm for my cab purchase. But if not, I may as well go 4 ohm for now and get the most juice out of my amp as I can and just get a completely new setup when I need it. Also, the 4004 is rated 400wats @4ohm and 260 @ 8ohm. We play indie rock, some mellow and some can get loud. How much of that 140W difference will I feel if I go 8 ohm? I know there is no right or wrong answer here, and it all depends on how much I see my band playing/myself playing. I'm just seeking suggestions and guidance from those with experience. Thanks!