I have not tried any notebooks, only netbooks. If you want a good recommendations for netbooks I would suggest Samsung N310 although any atom processors will need a fixed kernel after 10.6.1 as Apple withdrew support. I think I would look for specs as close to Apples as possible. I would personally go for core 2 duo and nvidia graphics. Avoid Intel graphics if possible as you may end up with a machine that is unsupported.