Ah, gotta disagree, 35-40 isn't much of a difference at all. If you're able to drive to the degree that 40lbs is going to make or break you in competition, go B18C5, for the rest of us mortals, just setup your suspension properly and don't worry about it.

And yes, you can keep A/C and P/S if you want. Or you could go H2B and really kick the carp out of the B-Series, but then yea, you lose A/C and P/S.

Type-R definately wins with bragging rights though, no doubt about it. But really, double the price for less power? Not my personal preference.