I really have been wanting an 18 lately, and this would match up perfectly with my Music Man HD130 (tube poweramp). It's at guitar center, so i'm gonna try to trade my Randall 1x15 (heaviest freakin 1x15 EVER) & Fender BXR100 for it. It's about the size of a 4x12, but not that heavy. Should I go for it? Are Music Man cabs good (especially their 18s)? Are they efficient? It'd replace my Randall in the Oxenrig: I'd be using it with the HD130 strictly for clean lows.