So, what makes more sense buying a 2LT/RS 300 HP 86 Oct V6 w/ 27 mpg in the mid 20's or a 2SS/RS 422HP 93 Oct V8 w/**mpg in the mid 30's? I'm set to order a 2SS/RS, but am wondering if it's worth it. What do you guys think? Is there really that much difference?