I've always loved the STi. You'll have a fun and reliable car to fill the gap between now and when the hype dies down for the 1. Be sure to have the latest reflash from the dealer to help with the throttle/hesitation issues that the 07's have. The accessport, even if stage one, should help further.
Regarding the 08 STi, nobody knows if it'll be toned down or not because Subaru hasn't released anything yet. The WRX's are, but some insiders think the STi will be pretty hardcore.