I have a 215, absolutely love it. But I need something that can handle more wattage. A guy has a 3620 (two 18" with two 10") and it's rated at 600watts. Which would be perfect. He's selling it for $135. The weight/size of my 215 fits perfectly in my car. I don't mind it at all, but the thought of a 3620 scares me. What's the overall difference in sound? Should I just get a 215 with black widows? Or does the 3620 sound amazing? I'm in a 3 piece hard rock/metal band. My 215 sounds amazing with the band.