I've gone completely geranium mad lately. Can't stop buying more and more.
I was disappointed with 'Dilys' several years ago when I grew it, but from all other accounts (including winning a AGM), it sounds like a good one.
The rest are good, although I would grow 'Orion' instead of 'Brookside'. Both are improvements on the old 'Johnson's Blue'. Only one is necessary.
'Bevan's Variety' is a selection of G. macrorrhizum.
I like Dilys for it's late blooming time. It blooms later than most other geraniums.