Having had both, I liked both. The Rocket (07 Classic with the floorboards), as everyone has said, is fast and I took it on a good trip down to Key West via Daytona back in 08...no problems at all. I then rode it, in one day, 855 miles back to Molino, FL (just north of Pensacola) thru around a 120 miles of rain...again no problems.
I then bought the T-bird (1700 version) and it was no slouch at all in the speed department...unlike Daryl...I occasionally go above the speed limit. In the last year I took it on two 2,600 mile trips and didn't give it a thought about where any repair dealerships were...I just rode.
Both are great bikes and again like the others have said test ride one of each and with the T-bird get the 1700 to properly compare it to the Rocket.
Good luck.
Dennis