If you do more highway driving, I'd recommend 3.07 or 3.42 gears. There isn't a huge difference between 4:11 and 3.73.
You're probably looking at somewhere between $165 and $200 for a gearset.
Here's a link for 12-bolt rear end gearsets:
http://store.summitracing.com/defaul...=egnsearch.asp