Ian- you seem to be looking at all 6-cell cars. if you plan on running only 6-cell, i would also take a look at the speedmerchant roadkill 12, while i have never run one, i love my rev. 3 (which is pretty much the same car, just the batts are aranged differently for 4 cells instead of 6). however most tracks have 4 cell classes now (and very few have 6), so i would highly suggest looking at the speedmerchant rev. 3, and with the new "v-force" front end coming out it should be untouchable (its won almost every year at the nats in the past 10 or so years).
As far as the V-force, I know some of the details about it, but from what i heard, and have talked to Bruce (the designer) about, it should very different (in a good way) than all of the other front ends out there. so it will defently be worth the wait.