With the costs of building the ls motor so that it would actually be benificial with a vtec head, your going to be spending a lot of money.

Turbo setup will probably give you the most power, for the amount of money you are spending.

Dropping in a b18c1 or c5, would basically give you a gsr or type r engine. Once the quirks are worked out, this setup would be the most reliable of the bunch. But, you would ahve to weigh the costs of all the options against just getting a gsr to start with and eating the difference on insurance.