Thanks for the feedback over the last couple of weeks regarding the Epifani UL-410 and UL-310 cabs. I went to Epifani in Brooklyn yesterday and tried each out. The 410 sounded great, so it was hard to have perspective on the dimished volume of the 310 in comparison, but when I got to my real loud rock gig that night, the 310 definitely held up. The Aguilar AG-500 head I use still clips after the gain is turned past 12 o'clock (even on the UL-410), but has yet to power-off when used with these Epifani cabs (as it always did with the Acme B-2). This fact alone allowed me to rejoice that maybe I'll be sticking with the nicely portable AG for a while after all (plus the dirty channel is a nice amenity). I've only used the rig on one gig but I'd almost venture to say the slap-tone is the best I've had from even a 4X10 cab (yes somehow I manage to insert funk on a rock gig), and even in the lofty club space, I could still hear the character of the bass pretty well. After seeing it, I think the UL-410 would fit in a cab trunk. In my experience usually those trunks are empty and they're very deep because most taxis are Crown Vic's. The reason I chickened out on the 410 is that I didn't know if there are any OTHER trunks or backseats that beast might fit into.. Nick Epifani was very helpful and seemed genuinely interested in my situation.