DSW, I should clarify. You are free to cross-shop any vehicle you want - many would argue that me cross-shopping a Legacy GT and an RX-8 would be silly. Hey, where are the Mini CooperS proponents - that can easily be optioned up to $36k, is sporty in nature, not too far off in power, has 4 seats and 2 doors, etc.?
I think that when deciding between a Mustang GT and an RX-8 the cars are so different that the decision becomes no decision at all - it will be a no brainer in either dimension. You want price, HP, cheap to repair, V8 rumble the Mustang is the easy win. You want handling, light weight, "modern" design (in the aesthetic sense, not engineering sense), Japanese perceived-quality, something "different", then the RX-8 is the easy win.
When I was saying you wouldn't cross-shop the two I guess I meant more to say that it would not be a tough decision - both cars excel at what they were designed for and fail miserably at whay the other was designed for.
Interesting that the mag reviews that pick the RX-8 have a similar undertone to those that pick the Miata - not the best for space, not the most power, not the best price - but still the best "drive" or best "feel". Seems Mazda has done a good job of capturing "the greatest driving satisfaction" in their sports cars.
To the Captain "The sunfire is the only car under $12,000. Thats why it sells well." Exactly my point. Its not about the best car, its about a bunch of other factors - in this case price (combined with further incentives).