I'm not sure if the vtec-E wiring is comparable to the regular vtec wiring...

You're not in a horrible place, the HX is like the lightest trim they make... Is it an auto or a manual though?

a B16a3 can be had for almost the same price as a B18a/b sometimes, something to consider.

it'd be a torque sacrifice, but it would make nice power in high-revs.

The LS tranny ratios just scream for boost though.

b18b!!! unless you want to purchase a cable->hydro tranny conversion from hasport (hint: you don't)

hybrid-garage will tell you what motormounts you need, I think you just need one for a b-series swap, drivers side, something or other...

-PHiZ