So back on topic as we all want to help the guy asking the questions and not hear each and everyones life stories....
Ive driven all three and my conclusion;
B4.. very good car, but in my opinion, too predictable and very boring..
XXX-CR.. more fun to drive than a B4, seems much more like your actually doing something which you enjoy...
X-6.. Best of the three, drives like a 4WD, just keep pushing it and pushing it! For me, its the best of both, consistency of the B4 but it keeps you on edge like the XXX-CR...
I got bored of my X-6 over the winter so ive modded a B4, basically cut the side off the chassis and moved the battery positions to make it slimmer, i think its great to drive! So much so, im getting a chassis specially made for it so i can be "unique" (look up "my slim B4" in the I Made This subforum if you would like to have a nosey)
Sorry for the little essay on my own car!
Best thing to do, go to your track, see who races what, ask if you can try them etc, pick the one you want...
I think Ash made a good point when he said about the likes of Ellis being quick with his X-6 but then Craggy is quick with his B4 but then so is Tricky with his XXXCR...
Get whichever you like the most... if it doesnt work out, you could always sell it anyway
Hope ive sort of stayed on track and helped...
Buy an X1108!
Tom