I bought a slightly preowned sport model and I'm very much happy with it. If I were buying new, I might have bought a GT, but I have no remorse about the sport. Alcantara seats are pretty sick, but they show every little speck of dirt, and the leather trim wears really quickly without very frequent treatment.
As for the HIDs and the Bose stereo, I could care less. Honestly, the Bose in the GT sounds pretty terrible for a "premium stereo." For a couple hundred bucks, I upgraded my stock speakers for Alpines, and they are way better than the Bose.
I'm perfectly capable of turning on the wipers and the lights myself, so the rest of the options don't seem that worthwhile. Honestly, it all comes down to the seats, if you gotta have the GT seats, go for it, if not, don't waste your money.
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07 Cosmic Blue MS3 Sport, MS CAI + Catback Sport Exhaust, HKS SSQ BOV, Limo Tint, Alpine Surround Sound Speakers