I made the plunge and bought the SP4 i5 8/256 - (almost bought the book but decided on the SP4) - Thus, far - very nice machine. Any recommendations for a blue tooth mouse? I have a logitech M705 USB for my desktop and like it but it or similar sized versions are too large to carry around. Two that seems to get great reviews are the Microsoft Sculpt Comfort Bluetooth Mouse and the Arc Mouse. I have always used a scroll wheel and not sure if I can get used to not using it, but the transport size of the Arc is enticing. thanks!