I'm looking to upgrade from my little rumble 40 combo amp, but on a budget. I've set myself at around 4-500 for the cab and around 300 for the head. Might have a little wiggleroom one way or the other. I've mostly been looking on the guitar center used section since they will actually ship a cab, and I've found a few that have potential. First, what I'm looking for in sound is obviously important. I want tight, well defined notes. I like a more aggressive mid heavy sound. I would say my dream cab would be a mesa powerhouse 412 but even used those seem to run over my entire head+cab budget alone so that's a no go. I like Darkglass cabs a lot too but they are also expensive and I haven't found any used. I play a lot in drop D as well as BEAD so that also factors in I suppose. One cab I've found is the Hartke Hydrive 410. Seems to have really positive reviews all over the internet and listening to Youtube demos it sounds really good, albeit nobody seems to be playing the kind of music I do in any of them. Some people do say they can't go very low, don't know how true that is. Aside from the Hydrive I see a few other Hartke cabs around my price range. Also a few old Edens and some from Avatar, which I've never heard of. There's one from Low Down Sound but I've never heard of them either. As for heads I'm looking at an Ampeg Portaflex either 500 or 800. They sound good and are available for reasonable prices. I like the midrange frequency selector as well. There are a few GK heads around as well. What would you guys recommend I look for? Thoughts on the Hydrive and Ampeg? Thanks guys.