If you can, get a mitsumi FD. I have used/sold hundreds of floppy drives over the years (yes I know they're slow, old, and small, but at times they're the only way) and the mitsumi drives seem to have the best reliability/compatibility. The suppliers I use say the same thing.

That said, the Sony drives are fairly reasonable nowadays, and most places only seem to stock them now. They're also dirt-cheap, and available in black if you want.

pca