I am considering an exhaust upgrade as well on my 03 Aero wagon. I'm leaning towards the 2.5" BSR system when the time comes. I've had all sorts of exhaust on all sorts of SAABs, and I'm older now and ready for something a bit more mellow. I had a full 3" system on my 85 SPG with no cat and 1 muffler and it sounded like a Harley when I got on to on ramps... From what I read the BSR is the way to go for a nice upgrade with stock sound. If it were you car, maybe you'd go 3" and loud, but considering it is your lady's ride, maybe you should consider something on the milder side, number 2 being that option.
Also hi Gary, it's been awhile!
08 9-5 Aero S/C
85 900 turbo - T5