Darling GT'ers!

I am a horrible shopper, especially online, so I turn to my beloved GT for some assistance. I need a nice "commuting bag" - something I can put my lunch and heels in while I commute. I already have a lovely purse, so this would basically be the equivalent of a nice professional tote - heavy on the "professional" word there. My sense of style is, well, frankly, somewhat terrible. I currently use a bright pink book bag as my tote.

Any help you can give me would be great - and um... added difficulty - something that's not going to break the bank would be awesome.