I\'ve had a C series machine(860) and a 5500, get the C700 if you can. The 5500 is a great machine, the C700 is even better plus having a machine which can be a palmtop like a mini-laptop or flipped around tablet/PDA style really improves the usability depending on circumstances. The keyboard is excellent, in \'laptop\' mode on a desk, I can type faster than on any device I\'ve had before, I wordprocess on my Z exclusively now. The screen is great, you can get more on the screen, I use many PDF\'s and eBooks, you will have to scroll all over with a 5500. The C700\'s faster CPU will be helpful when handling large PDFs, I have huge engineering diagrams which are much easier to work with on my new machine.
The 5500 was the greatest \'computer\' I ever owned, my C series (860 in my case) takes that greatness further by making it more like a laptop, plus I can use it as a \'PDA\' IF I want.
The person I gave my 5500 to is now saving for his C series, probably a 2nd user C700 from conics too. (I\'d recommend the audio remote control from Conics too)
You will not regret it. Get the C700 ;-)