All the hype aside, I'd wait. It's the first year of the new generation. Stuff will go wrong. Wait a few months, save up, and get the premium. Don't get me wrong the base GT comes nicely loaded, but I want to be as comfortable as can be if I am going to stay in the car 15+ hours a week. Just my 2 cents. You'll love whichever option you go with.
Car: 2011 Black Mustang v6, 6-Speed Auto, Premium Package
MODS: KW Variant 3 Coilovers w/ Maximum Motorsport CC Plates | J&M Adj. Panhard Rod | AEM Intake | Bama 91R | Borla S-Type Axle-Back | Boss Front Conversion w/ Saleen Grille + Foglight w/ Auto Headlight | Boss Rear Diffuser | Forgestar F14 18x10 +42 w/ Nitto NT05 275/35-18 (all around)| BMR LCA | SVT GT500 BBK|
Streets of Willow(CCW)- 1:29.661
Buttonwillow(CCW)-Let's not talk about it