A buddy of mine recently purchased the MD8, and he has had nothing but trouble, mainly with skipping. In fact, he had Yamaha send him another unit--he has the same problem with the new recorder.
I was interested in the MD8, mainly because of the excellent EQ on the MD8. Plus, whenever I recorded with my friend on his MD8, I found the recorder to be extremely user-friendly-- until it would skip in the middle of recording. However, I decided to go with
the Fostex DMT-8vl. (I wanted an FD8, but I got a great deal on the DMT. The two seem to be very similar.)
I have had no problems with my Fostex so far. (I've had it a couple of months now.) The only drawback is the limited space of the hard disk recorder, which requires some sort of "backup" device to catalogue your recordings--unless you only plan on recording one or two songs for the rest of your life!!!
Although I have yet to try this myself, the Fostex supposedly allows you not only to save a recording to DAT, but also to load that data back to the recorder from the DAT.
If anyone knows more about this, I would appreciate the advice.