From what I was reading, you want something that scans at at least 4000dpi and 48 bit color. ALso you do NOT want to scan to JPEG, as you will lose some image data through compresion. You want TIFF or a scanner that does DNG RAW (some do).
The V600 has the specs you need.
I found this helpful review of the V600, but the review also has a short education on scanning concepts that I think will benefit anyone who is considering scanning their negatives. I just decided to try this, too. So I only recently found this review and it has helped me better understand what I need.
Scanner Review: Epson Perfection V600
There are other scanners on B&H that are dedicated and have carriers. I have read reviews on some scanners, and some people report risks of carrier breakage, or of carriers or slots that make it much easier to scratch and otherwise damage negatives. Read reviews on a scanner before you buy, and if there are no reviews, DO NOT BUY!
Also, there are some scanners on the market that are 14MP and claim they can "bump" that up to 22MP with software tricks. The reviews on that technology are mixed, but the real measure of what you need is based on DPI and color.
Here is yet another thread with very useful information on this:
How do I convert all my film negatives to digital? - Forums - CNET
I suggest reading the V600 review link and then the above discussion thread, as after those two resources I feel I have enough information to make a much better informed decision. So far I am leaning towards a V600 myself. Hopefully Santa will bring me one this Christmas
Hope this helps. It sure helped me!