I made a move similar to the one you're pondering. Went from an '03 Nissan 350Z to my '05 T4R and haven't looked back since.
I bought the car in '05 with 12K miles on it and only kept it for a year. I didn't like the car and because of it, have pretty much sworn off Nissan products. Sure it looked good, sounded good, and handled amazing, but it was small little knick-knacky things with it that drove me nuts. Also it wasn't very conducive to my lifestyle at the time because I was playing tournament paintball and was constantly traveling. So I needed the room to haul gear and people and also, it's easier to drive out the some of the fields in a truck.
I did, however, buy a CBR600RR like Glock_19 to sort of quench that speed fetish. Perfect balance of what I needed.
I've owned my truck for over 6 years and have over 160K miles and wouldn't trade out of it for anything. That's the longest I've ever kept a vehicle. I love it more than the day I bought it. It's the first truck I've owned and I don't see myself ever NOT having a truck. Even if I have (additional) cars in the future, I'm a truck man and always will be. It was the right move for me. May not be for you, but good luck with your decision regardless! Hope that helps.