Guitar tone is pretty sick! Can't really tell where's that "messy lowend" you wrote about, I just find the bass to be a little thin though, I'd really love to hear it growl and support those guitars' low mids, anyway it's a very good mix IMO, of course the sampled drums make all sound less natual (but I use 'em too, 'cause I understand recording real drums without an actual studio it's not that easy), still I must say: good job!