7.0 and 7.1 pretty much look/feel about the same from an admin perspective. Heck, I had not touched much since about 7.0 b4 or 5 and when 7.1 came out I was able to get my site up and running in about 15 minutes and this included importing from 6.5.5.
I would suggest playing with 7.0 and if you like it, then buy it and you will get the release version of 7.1.
