I know there are tons of these threads on here and I can assure you that I've been using the search option and getting tons of opinions and info on any amp, cab or combo I've been looking at. I've only been playing bass for about 5 months or so. The only amp I have is a little Rumble that's been fine for learning and practicing on. I'm now at a point where I can play some songs and so I'm looking to upgrade my amp with some tax money. I just have no clue. A friend of mine plays in a band and he's offered to set up some jam sessions with me along with his bandmates and some other musicians. In my mind I want to have a rig that will work in this type of setting and will also serve as a good practice amp. I'll be jamming in a small movie theater, garages and homes to start with. Initially I was looking at some of the GK combo amps. The MB115 and MB210 specifically. I'm also entertaining the idea of buying some used gear and going with an amp/cab setup. The GK Backline 600 has caught my attention for an amp. I guess I'm just looking for more suggestions. I have no reason for mentioning only GK other than it seems to get a lot of mention around TalkBass. A combo seemed like an obvious choice for me but I don't know. I know some combos allow you to add a cab in the future. The type of music I play is rock and I have an Ibanez GSR200FM with chrome flats. My budget is $600 or less. I apologize for another one of "those" threads but I'm just completely overwhelmed and clueless. Thanks in advance for your help.