Good stuff Robert.
Regarding the SPC's - While I was measuring my spare subframe last night and realizing the upper left control arm mount appears to be pulled outward the value of SPC's adjustability crossed my mind.
Regarding brakes - Give Tobin at Kore3.com a chance to bid a system for you. His knowledge and customer service is equivalent to a 30% discount and his components will perform at least on par.
Good seats and a steering wheel are your connections points to the car. Don't save money there and make sure they fit like a good glove.