Spring. Power, dunno yet. Depends on how much I want to spend on it, really. I want to get 18s on it, C5 (or C6) front brakes, disc conversion on the rear, tubular trailing arms on the rear and a solid set of swaybars.
If I do all that, that will be quite a bit of cash, so then it would probably still be on the stock turbo. Assuming I keep the stock turbo and add a camshaft, hopefully a low 12/high 11 car. When I put a real turbo on it... deep into the 10s.
It will be a while before I'm 100% done with it though, a lot of little things I've been wanting to do for years now.
The actual swap won't take any time at all. Everything bolts directly up. Honestly if I spent a whole weekend on it I could probably have it alive... I want to do it slowly and cleanly, though.