I've owned the Fujitsu P1510D. I would suggest you see if ALLTP has an 8" demo unit you can try out for a week before downsizing. Of course if the 10" on the TC1000 worked well for you... But remember with the 8" you are dealing with a smaller, cramped keyboard. The 8" was a completely different mobile experience for me. For travel and just wanting to respond to emails at length it was great, but I could not get myself to embrace it as my main device.
Don't quote me on this...but if I recall what turned me off of the Flybook was the screen. It did not use the Wacom technology. I think.
A good business foundation to build upon - Say what you mean, mean what you say.