In reply to Andrew Mallinson:
I bought a pair of my regular shoes half a size bigger (anasazi verde's at the time). This worked well as it was the same overall feel as I was used to for single pitch climbing, but a little more comfortable. I've found that some of the longer routes I've done in the Dolomites and Bregaglia have the odd hard bit, so decent shoes are worthwhile; I also find it easier to place less gear and move fast on VS-type terrain in a pretty technical shoe that's just a little bit looser. In the past I've tried less-technical shoes for these type of routes, and generally regretted it partly cos it just makes things less enjoyable.
At the VDiff end of things, if you climb E2 then you can manage with anything obviously, and it's just a case of finding something comfortable. In that case any old shoe that you can get on perhaps over socks is going to be ok IMO. You could even use the scrambling boot-type things, though you'll regret that if you get off route or find more technical alternative pitches that you want to try.