I recently acquired a Hartke Transporter Cab loaded with a Carven 600W 8 Ohm cone. I am, in the very near future, going to purchase my first bass amp head. I have been asking questions here on the forum, and doing a bunch of research. Thanks to many of you on the forum, my search is narrowing. However, I am still looking for advice/opinions. I am looking to spend $500 tops. The first amp that comes to mind is the Hartke HA3500A (Power: 350 Watts at 4 Ohms, 250 Watts at 8 Ohms). This begs a few questions- -Is 250W enough to drive the cone? Can you damage an amp or speaker by UNDERdriving it? Another option: A GK Backline 600 (300W @ 4 ohms) with the addition of a 4x10 Hartke Cab (300 watts at 8 ohms). Combining these two cabs into to full stack would give me a 4 ohm system (check me on that guys). Also it should push the GK amp to it's 300W potential. Is 300W through a 4x10 and a 1x15 enough to play dive bars and small clubs? I am not sure what I am doing here. There are lots of options out there, and I want to stay as close to $500 as possible. I have a gig coming up, and my little 1x12 180W combo isn't even cutting it in rehearsal. I don't gig out much... maybe 4 to 6 times a year. I used to go the PA route, but it wont work with this band. I want to make a smart buy. Your thoughts, opinions, and experiences are welcome. Thanks in advance.