this.
when i buy windows i go lenovo. the machines are still built like tanks and work fantastic.
i actually convinced my boss to let me buy a lenovo in a company of dells. mind you others are or may be better but lenovo just works perfectly for me. my x61s has been running solid for 3 years now and i just got the x201 which should tide me through for another couple of years.
if in the ultra portable space try the x220 (to be released soon) otherwise try the T series. u cant go wrong with either option.
For the AC above. checkout the x220
http://www.engadget.com/2011/03/18/lenovo-thinkpad-x220-review/