xtro over usb2

Ive recently got the oportunity to buy 2 xtros, planning to use them over usb2s, what do people think of this combination? We mainly play drum and bass/jungle and have heard the xtros have a great kick section. However ive also read that some people think the xtros seem to lack weight in the upper mids, can anyone talk from experience? or any other suggestions. Im new to the forum and appreciate any advice in advance.

do they have the standard 8" horn or up graded 8" like the xt8 horn...

theyve got xt8s not sure which mk they are though. there loaded with b and c 8", 18sound 15"s and a celestion comp driver