If you choose to go through the Swiss Rhone valley and cross to Italy, I would take the Nufenen pass, the descent into Airolo is one of the best I have done ever.
Simplon pass is shitty, lots of traffic including trucks. If you decide to go Furka from the Oberwald side and descend to Realp, be aware as that is the "shitty side" :)
Also from Andermatt is the Gottard Pass - old Tremola Road is an absolute stunner & cobbled most of the way! Probably best enjoyed towards Andermatt though (cobbled descent less fun).
If you choose to go through the Swiss Rhone valley and cross to Italy, I would take the Nufenen pass, the descent into Airolo is one of the best I have done ever.
Simplon pass is shitty, lots of traffic including trucks. If you decide to go Furka from the Oberwald side and descend to Realp, be aware as that is the "shitty side" :)