I used the newer power tahoe seats with the integrated belts. I also got the third center seat that folds down to a console. I made steel adapter plates to mount them and it worked out real well. I Also used the flip and fold 50/50 tahoe 3rd row seats in the back with the mounting brackets from the tahoe floorboard to retain the quick release and fold feature. Those brackets are worth their weight in gold, it took me nearly 4 months to find them! If you want I can take some pictures of the whole setup later this week. They are really comfortable, cost was about $600 for all of the fronts and $500 for the rear. Even at that high cost they were hard to find. They are cloth though, so eventualy I want to recover them in leather. I would have just bought leather, but I couldn't find any 40/20/40 front seats with the middle seat in leather. All the leather seats only had a console in the middle with no seat.
by the way, I am 6'5" and with the seat all the way back there is more than enough room to be comfortable.
Brian