After 4 years of good service, I recently went out to replace my SST5's. My local shop had a pair of SST8's in my size, so I tried them on for fit and feel. The SST8's felt great walking around in out of the box, and provide a level of lateral stability you don't get with Tour Ultra's. I went ahead and bought them on the spot.
After about 30 games, no regrets at all. It took a few games to get used to, but I love the additional support you don't get with the more 'slipper' feel shoes. As far as the argument about comfort, you have to have some serious orthopedic issues if you don't feel great in these shoes from game 1.
Anyway, a vote for the SST8's.