Suggestions on rims please

Can you guys give me a recommendation on what rims to buy for 06 GT? Primarily in terms of size but any brand/model suggestions would be great as well. I was thinking something 18x10 in the back and like 18x9 in the front. I have however not seen any Stangs in person with anything but stock rims and the wide ones i have seen in mags and online were 19s and i want to keep it at 18. I am looking for something that sticks out a bit and maybe the same width in front and back but i thought you guys have likely given this a lot of thought already and your opinion would be greatly appreciated. I just want something that looks more aggressive and deeper dish, just not anything that would harm performance and/or have a negative impact on the ride (much). I currently have the Fanblade style 18 factory rims and the car is black. Thanks a lot!

Thnaks a lot for the posts. I am looking for both look and performance out of the upgrade. Are you guys famaliar with FRPP's Handling Pack (M-2005-FR3)?

http://www.fordracingparts.com/parts/part_details.asp?PartKeyField=8976

I plan to get this package and install it, what type of effect good or bad would it have in regard to tire size? Would larger (wider) tires compliment this package?

In regard to how i drive the car i drive it pretty hard but it is mostly straight line acceleration and not so much cornering. At the same time i don't really like how it handles right now and more grip at higher speeds while on S-curves and agressive lane changes and so forth would also be desirable. I think the bigger wheels and tires look better but I am also looking for a performance boost. Thanks a lot.