Doesn't matter for me, if Tor fails under Windows because Im using
mainstream :-). I will try it for week on my home server before running
on production.
Tor 0.2.0.x is somewhat more stable than 0.2.1.x-alpha in general. For
example, we just made a change in 0.2.1.7-alpha that will make Tor
mysteriously fail to start on some obscure operating systems.