Nice list. Never heard of those wheels before, so I googled--very nice!
My suggestion at this point would honestly be suspension! Many people totally ignore the "feel" aspect of the car and focus on the power. I think you'd be *amazed* at what some swaybars/endlinks alone would do. Personally, i havent managed to do any bushing upgrades, but I hear great things about things like shifter and steering bushings, engine mounts, not to mention actual suspension bushings.
Anyways, I'd love to see some pics!