In reply to stoneback:
Saas Fee is the way go.
Packing those four hills into six days will be pretty tiring. I recon it will feel more like an endurance challenge than a holiday but if that's your thing... I'd prefer to spread them out a bit with more rest days and diversion activities over a two weeks holiday.
I think on these particular mountains, the Scottish experience you've out-lined with a bit of crevasse rescue practice and further bedtime reading would see you alright but fair enough if you don't want to feel you're winging it on the first try.