The Bains de Saillon is pretty nice. Sadly I was quite ill last time I was there, so didn't eat dinner. (Not the hotel's fault!)
I have eaten in the hotel in the past, lots of choice, can be very busy but the staff was very helpful in accomodating us.
If you don't have an early start, go for a stroll to the cute little old town nearby and devour a raclette or fondue (both sorts). There's a really nice little wine cellar near the restaurant that can be quite fun. Gym and pools are an extra cost.
15 min to TAG
There's another hotel up the mountain near a chairlift. The views are amazing and there's a really nice local swiss raclette restaurant nearby.
Allow 30 min transport to TAG.
I have found TAG in Sion to be brilliant for their service and assistance. They'll know where the decent hotels are and the transport they arrange is excellent. Very reliable.