Re: heavy sound on a budget
Yeah, here's my suggestion: an Epi Special SG with a change of pickups, probably an Inavder or Seymour Super Distortion. Those two push the chunk-factor and really get a heavy sound.
Otherwise, I second the Pacifica 112. I've experienced both guitars. The Epiphone is more a punk's guitar and the yamaha's more a metalist's. Oh, man... the action on that yamaha was amazing... drool. Now, my friend's upgraded to a Jagstang... yawn.
as to the "not getting heavy without a 4x12" debate:
I used to get hella heavy with my bass rig running my DS-1 and a guitar through it. Also, I used to get pretty heavy with my 15-watt squier bass amp and DS-1, at least, until way to much giging and practicing with that little amp ended that speaker's career.