cpsmusic:
At the moment I'm leaning towards a Leonardo.
Yes that will work just as well if you can put up with the form factor. I would recommend getting a pin header strip for both sides and soldering wires to that.
I'm in Melbourne (Aus.) so I'd prefer to get something local as international shipping is very slow at the moment.
Yes I have heard that from other "down under" members. It doesn't seem to have effected the UK. While the "expected" time scales have gone long with a gap of about a month between the earliest and latest estimate, they seem to arrive just before the earliest.