I would go with the 3D Carbon Boy Racer hood, the Steeda front air dam (from this picture) and the duck-tail form the XMP. Maybe the West Trendz hood, but I like the 3d best. I like the subdued look, with just a little more flair than the stock body. Of course the car would have to be lowered a little with the 18" fan blades on it, too.
I'd say Cervinis. Mind you, that chin spoiler is going to get shredded as soon as you take that car onto Midwest roads and you're gonna have to take curb ramps at 180 degree angles . But it looks good overall. And another big thumbs up for ducktail spoliers! If I were to buy a new Mustang (and I could be tempted come Cobra time) I'd want to optionally be able to have one of those instead of the mini wing effort which looks like a piece of crap on an otherwise good looking car.