$90,000 seems pretty damn steep, if it's based off an XR8. You sure it's not a typo and it is based off the GT?
As a comparison...
Upgraded suspension: $2000
19" Wheel package: $6000???
Minus the rear wing: $200 (for the SS - Sparkles Special :s4 )
Total: $96,000 odd bucks.
400+kw looker, for not much more mulah.
On the other hand, if you want a fairly rare n/a BA bullet with a side of DJR/Herrod special sauce and assuming it is based off a GT, then I'd be pretty happy with the DJR offer, minus the cup for the bonnet. :angel: (Is the bonnet cup there just in case a GTS can still kick it in the bulge?)