If you're using the bass pod for recording then don't get it. Actually get something that is supposed to be used for recording. The bass pod is a very bad investement. I thought you had a hartke bass head? Not a firebird unless you were planning to replace the hartke with the firebird. Replace the head then if you really want to but the only thing the power amp would give you is more power, no extra crossover stuff unless it has it built in it. I don't know if you'd get any power from the hartke but I think you would. Get the Crown power amp but make sure you don't push the volume too loud or there's going to be a lot of broken speakers. Do you like your bass though? And, do you have the money to do all of this? It's a lot of replacing and the only thing I see you keeping is the 215.