My old Dell laptop does not support the hi speed USB, but it's a good reliable machine. When I replace my laptop with something from the 21st century I'll start using the card reader.
In the mean time the built in USB on my Marantz works fine.
As far as the whole CF brand issue:
I did base noise level comparisons by recording with pad off, no input to the XLR, gain wide open.
Sandisk 4GB Type 1 has a baseline noise level that is identical to the 256MB Lexar CF that came with the unit, and I have had no issues with using the Sandisk 4GB CF card.EDIT - I have now seen some Card Errors with the Sandisk 4GB CF and am switching to Lexar 2GB CF.