I've been using a SanDisk 128MB CF for well over a year now (countless cycles inside my digicam and regular file storage) with no hitches. It comes at a slight premium over other brands though (costed around USD42).
As for the other issue, I have the (wrong?) impression that "high speed" means it can deliver at the throughput of USB2.0 (due to lower latency or somesuch)? My SanDisk CF is not high speed and it seems clear that the transfer rates over USB2.0 are pretty low.