I haven't heard of any problems with the 9-7/Envoy/TrailBlazers. The I-6 is a smooth engine, doesn't feel like it has as much low-end punch as the ol' 4.3 in the prev-gen Blazer/Jimmy, but it's a lot more refined, isn't coarse when you wind it out.
The Saab version looks pretty sweet from what I've seen at the dealership. Incentives should be pretty decent on them right now.
I've currently got a 07 9³ 2.0T SportCombi 60th Anniversary edition. Bought it new in Sept 07 and have 19k miles on it. Only main issue is rear-door window trim that won't stay in the channel, hangs down a little until you push it back up again. Overall it's been a pretty fun car, great for road-trips.
4-year/48k B2B warranty, 5-yr/100k powertrain, 3-yr/36k scheduled maintenance included.