When I was looking I got put off the T150 for reliability reasons. I honestly don't think the G29 is that noisy and I was able to get it for less than the T150 + pedal upgrade.
Interesting rui10 thinks the brake is too hard, I've been considering getting one of the aftermarket springs because I find in GTS I get better braking if I use less brake, I tend to whack the pedal a bit too much, my thinking is if I make it harder it will suit me better.
I think the T150 looks a bit cheap in all honesty, not that it matters a great deal.