CZ all the way!
I just got my CZ american as my second .22 and it's good enough that I now have a favourite caliber.
Do a search in this forum, there are a few threads about the american vs. the varmint. I liked the american because of the classic styling, and the fact that a heavy barrel is pretty much unnecessary in this type of rifle, only 5 rounds bolt action, so it won't get hot, and the difference in accuracy will be negligable, especially given the weight difference if you will be lugging it around at all. The american has much nicer wood as well.
Either would be a great choice, as would the BRNO rifles, a bit more but apparently well worth it. Then get yourself a leupold scope or something similar with the money you save.