Hello all, I've done a lot of reading about combo amps and head/cab setups; and unfortunately I'm confused. I've recently started jamming with some buddies while just hanging out and having a few beers. I had bought a Rogue combo amp from a pawn shop for real cheap and I immediately knew why when I tried to play (I'm an idiot) Anyways, I'm graduating college next month and I am getting a graduation present from the grandparents and I believe it is time for a nice head/cab setup, but I'm not really sure what direction to go with the desired sound I want. My price range would max out around $500, plus or minus a bit. The style of music we like to play is typical stoner/doom stuff. We really enjoy Sons of Otis, Electric Wizard and Ufomammut. Some heavy bass, psychedelic stuff. Sorry for the long post and any input would be greatly appreciated, thank you!