Regarding 7's,I love em!! Have a Stagemaster 7 with a Warpig in t' bridge. Play it most of the time, though it's still not the easiest thing to play. Thanks to Tim it does sound good tho.
With 8's, the only ones I have tried are Doug's* prototype 8, and the prototype 884 and the finshed F8. Simply stunning, great tone and playability. Nobody (me included) really needs an 8, but its huge fun!!! Closest analogy I can think of is it's like a Golf VR6. Nobody needs that much grunt in something that small but god is it fun!!! that low F# is good for scaring small children and animals also............
8) :D
*Blackmachine 8)