I have used the Epson V500 for several years, but also have experience with both the Nikon Coolscan V and 8000 ED. The Epson is a tremendous value and comes very close to what the Nikons can do at a fraction of the price.
-Scans of certain MF films can rival that of top-end scanners; Results will vary with native film contrast, development, and lens used; Recommended films: Acros 100, Plus-X, Tmax 100/400 II, -Quiet and reasonably fast, --Very inexpensive
-Don't have big expectation for any 35mm; Close examination will reveal lots of artifacts, poor shadow detail, lack of finest details; Don't use this scanner to show off you latest Summicron aspherical baby, -Scans almost always (except with high-contrast negatives) come out very flat, necessitating...