Safest is to go with an established Saab tuner who understands the Trionic 8 software.
There are one or two out there, but some have more experience and options available.
Maybe Maptun would suit you. I think that they have a form of discount structure as you work your way through their offerings, so you don't pay full price for the next stage up.
http://www.maptun.netSeveral dealers around, check their site.