+1 for Fujitsu
Instead of a S1500M, I went with the S1300M. I'm glad I did! It's portable enough to put in my book bag and take with me to school if I need to (done this more than a few times), can be run and powered using only USB (this is the very method I use), it's fast, light, folds up small... it really has no cons except that it could have been cheaper. I still feel that the S1300M has a fair price though.