great stuff
i wouldn't describe the jcm800 as gritty though. i think it has a glassy "sheen" to it, which is very different from all other marshalls. once you hear it, you can identify an 800 from a mile away. with an 808 in front and V30's behind, i think it's marshall heaven
quick note on the marshall jubilee...it was actually designed to run into V30's, so they should always be your first port of call with this amp. also, unlike many other marshalls, you can max out the bass out control without introducing muddiness, as long as the treb and middle are high enough. (i used to have one of the original ones, which i bought in 1987...traded in my AC30 for it. it was actually the short head and angled 2x12 cab. collectors item now)