You could always just do a typical GS-R swap, or you could go ITR. It's going to be a lot cheaper and more performance oriented than putting another LS motor in there, and certainly a lot more reliable and cheaper than going with an LS-VTEC setup.

I'd go with a GSR swap just because it's cheap, reliable, easy, there's tons of them floating around and you can keep all the stuff you stated above you wanted.