owned both
I've now owned both an RX8 and now, the '05 Mustang GT.
I would still have the RX8 except for someone rear ending it with a Dodge RAM this past winter and totalling it.
With the insurance check, I actually thought about buying another RX8. But, I thought I'd look around to see what else might be of interest.
Looked at the usual suspects......GTO (couldn't get past the body...the weight really negates what should be a big performance increase over the 'Stang.....shifter was sloppy....steering was slow...teeny trunk), 350Z (as Edmunds says, would have been real hard to live with on a daily basis.....terrible hatch room...questionable interior), S2000 (same lack of torque that plagues the RX8...too small), Audi TT (very uncomfortable interior....pricey....questionable reliability).
Bottom line, the Mustang GT is seductive....from its performance, to it's looks, to it's functionality (if you don't have to use the back seat often).
While the RX8 is at the top of the class as far as handling, shifting, steering, and the 9K RPM runs were thrilling, it is a bit "quirky". It's MPG is disappointing, although I don't know if that's something anyone can bitch about in the class of cars we're talking about. Premium is required, and with gas prices going the way they are, you'd be paying at least 20%-30% more for gas than you will will with the Mustang GT.
No, there is no torque down low in the RPM range (you won't blow anyone away right off the line).
You do have to be careful to keep a good eye on the oil level as the RENESIS RX8 rotary is designed to use oil.
Mazda has had some pretty big issues with flooding. While it never happened to me, plenty have had to have the car towed into the dealership. You have to make sure it's warmed up before shutting it down. So, if per chance you stall it or just move it around in the driveway when cold, you're in trouble.
All tha said, the rotary sounds like an Indy car when you wind it out. It's built well....has a very nice interior, and like our Mustangs, can be bought for under $30K. What you get in return is a comfortable, well built car that handles with the best of them, but needs a bit of TLC in everyday operation.
Like a good woman (excuse the following sexist remarks, ladies). the Mustang GT feels like you can ride it hard, for a long time, with no complaints. It looks really good, no matter what the occasion and it will put 99% of the competition to shame when it needs to. Plus, in addition to looking great, it sounds even better when it's time to get "busy".