Interested in opinions or comparisons between the E15HP and SB13 Ultra... ears-on even better. Both are VERY similar in size (once feet, amp and grill are considered), and after shipping and high-gloss finish, not too, too far apart in price ($1311 vs $1599)... E15HP high gloss currently on sale ($1199 in cart), so very tempted. Will be in a room that eventually will beg for 2nd sub (~4500 cuft), but will be starting with one and would like it to be no larger than either of these. I found one thread comparing and it was stated they were in a 'different league' or something like that... I find that hard to believe given Rythmik's rep for value and similar pricing. Will be for mixed use 50/50 music/HT.