Who gets stuck w/ the bill!?
Anyway, aside from your delusions of F&F, the Spoon engine is very costly and is made for strictly road-racing meaning it's probably not street legal. Moreover, it has no torque... It's best driven at astronomical revs.
That said, from a ITR vs. S2000... I would choose an RSX Type S. It is also equipped with a 2000cc engine although differently designed than the S2000. Imho, they look sweet! I love those tails! And, close-ratio sequential 6 speed ownz you! Also, the aftermarket is moving quickly for the RSX. (Outfit it w/ JDM Type R stuff!)
Or, get the S2000 and save up for a Comptech supercharger... No more lack of torque!