I take my laptop to/from work frequently. Personally, I like carrying it in a padded sleeve and then throwing the whole thing in a tote. I don't like carrying a lap top bag then another tote for shoes, lunch, etc...
I agree with pp. i'd get a bag that you can use for more than just the laptop. kate spade constantly sends me emails about their sales, so maybe you can wait for one of those? or do you have outlets near you? by me there's a kate spade and michael kors outlet, so i'd definitely check out one of those if i was looking for a work bag.
Hmm. You ladies might have a good point about getting a sleeve and just a larger tote I can use for more things. And good idea about the outlet, I don't live too far from a Kate Spade one:)