How about the Dell 700m? It's 12.1" and with the optional 8 cell battery, it lasts about 5 hrs. The price is decent too, you should be able to get one for US$1200 or so. Look for the widely available dell.com coupons
Personally, I like the IBM thinkpads more when it comes to business laptops. The X series is very light and small, fairly durable too.