What do you want it for? Is it for taking on holidays, work use, general day to day? How big? What do you plan to carry in it - does it need padding for a laptop?
If it's for work I got this in WH Smith recently for £20 and I am really pleased with it. Fits laptop, cables etc and several A4 files comfortably and looks well 'inoffensive' . Not sure any of these things count as stylish!!!