Yeah, I think the Si has the most potential out of all of the them. Also was at the bookstore today, the newest HCI (some tuner magazine) claimed that alot of mfrs are reluctant to develop for the new Si because it hasn't been selling well. However, out of all of them I see the Si having the most backing. Compared to the number of Civic parts, there's only a handful (if you look hard!) for the current Protege and Sentra. And its still too early to call for the Tiburon, but I suspect the availability of aftermarket support, while its growing, will be small for Hyundais as well.