When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Tire Rack said you don't need spacers, but you can get 5mm spacer for the rear making it +30 rear and +35 front. Go with 18x9 all around. Ask Tire Rack for the 5mm spacer for the rear and also the special long nuts so it will hold the wheels better.
Get Continental ContiExtreme Contact. Very affordable and they are ultra high performance all-season tires. 245/40/18 is $149 and 275/40/18 is $168. Plus the 18x9 R8 are $289 a wheel.