I have a Saab 9-5, but I have a mate who has a 9-3.
In terms of driving, performance and comfort I'd say the Saabs score highly, for a bloody great big estate car mine was cheap to buy and is fast, handles well and is comfortable. My mate went from a sporty Mazda MX-5 to a 9-3 as a practical option and even after the MX-5 he enjoys the 9-3's drive. Bear in mind that mine's a 2.3 petrol and my mates is a petrol too.
BUT I wouldn't say they're particularly reliable. Despite me doing a pretty low mileage. mine does have things go wrong and they're not that cheap to fix. If correctly serviced they will cover huge mileages, my independent Saab specialist reckons to service every 12000 miles and change oil and filter every 6000. I tend to manage the services but I don't manage the 6k oil & filter changes.
The interior on mine isn't great quality, the GM takeover of Saab shows up more here than under the bonnet, it won't be up the standard of your Honda or of some of the others you're considering.
On the plus side it is a chance to own a Saab while you still can!
My Mrs has had a Mazda 323 and then a 3, they've both been good cars. Mr's Dave is crap at getting her car serviced and the Mazda's have lived with this abuse well.