"3) Moving files between PCs, toothpick, paint scraper, etc. "
You lost me a bit there.
I have an older, slower system than you (not bad though - i5 750 / 4GB ram) and I find little or no delay on internet browsing, etc. Loading some big apps (starting games, etc) takes a moderate but reasonable amount of time. So I'm not sure that readyboost or temp internet files on a thumb drive will even help that much.