Vinyl vs. wood clad windows

So we are now deciding between vinyl or wood clad windows.  We initially were going to go with Anderson's Silver Line window but have been hearing differences in opinion on vinyl vs. wood.  From what we have heard so far...wood seems to be the best in the long run and will hold up much better, especially with the extreme differences in temperature that I'm sure our winters/summers will give us.  I found this website that gives opinions on the topic but we'd love to hear from all of you followers on your opinions as well!

http://ths.gardenweb.com/forums/load/windows/msg0518223420195.html