I recently acquired an Epson V700 and then a Nikon V. Although the Epson does an excellent scan of 35mm, the Nikon is very noticeably, better in both in detail and tone. However, when comparing with the scans (about 1.3mb) from the One-Hour finisher I use, the Epson is way better than what they gave me.
The Epson of course wins hands down on medium and large format, and I have lots of 120 roll film and 4x5 (and some 8x10) films from years ago that I want to scan.
I do use the Epson V700 with the 35mm for an initial scan. The Epson scans the full roll of 35mm faster so I use it as sort of a high end proof and for many uses, the image is more than satisfactory. If a particular 35mm image warrants it, I scan that image again in the Nikon V.