I think Prestwick is up to you. The Oban field is quite good, very friendly! Alot of French aircraft were there when i visited, also some nice old planes like a Husky amphibian and a Piper cub (At least i think it was), circuits are always over the bay and watch out for the big hill! There is a nice resturaunt practically at the end of the runway with a good view of the river mouth, the airfield staff will help you get there. Be carefull though, we ended up ducking under a Cirrus that was taking off (that was scary!), very nice place well worth the visit.