In reply to Flicka: Having been a Haglofs test pilot, for the soft shell jacket a few years ago I can vouch for the quality of thier garnmets. I also have a Haglofs powerstretch top which is superb. The only problem with the system you are talking about is overheating and 'bulkiness'. When you're slogging it out in the mountains you will sweat buckets, then cool down rapidly when you have arrived. When you have a midlayer and fleece on it will restrict your climbing movement. If you are buying you should consider the following systems:
Thin baselayer - HH Lifa top or similar
Fleece - microfleece top - good for climbing in.
Windproof top - Montane windshirt or similar
Belay jacket - thick fleece or whatever or hard shell
You could dispense with the windshirt if you have a windstopper fleece.
My current system is - HH Prowool top - outstanding.
Rab Vapourise or similar.
Belay jacket - TNF redpoint or similar synthetic jacket or hardshell.
I believe that the latter system is much more versatile, lighter but not necessarily cheaper! To be honest I only use fleeces for the pub these days.