I agree with cs_foto. I have used a LS-9000, and I own both a V700 and an LS-50. The Nikons are better, but only slightly. Honestly in many cases they can be a headache because of 1. Rapidly aging software that Nikon no longer supports and 2. the heavy amount of retouching each piece of film requires.
When looking at side by side comparisons the difference is there, but it's not night and day, and that in my opinion does not warrant the substantial expense.
Plus I don't know if you live in NYC, but if you DO!
Photo Village will let you rent a Hasselblad X5 for $175 dollars for 4 hours. They say you can do about ten scans an hour, at the very least. So that's 40 scans, using one of the best machines in the world, for $175.00.
This level of resolution is only necessary when large prints are being made, as my V700 with a 6x6 negative makes lovely prints for my 11x14 portfolio. Now that means you can scan about 11 or 12 times before you equal the cost of the Nikon, and the scans will be better. That's probably more than you would need to scan over the course of 2 years. That's 440 scans, at least. You have to ask yourself, do I need 440 mural sized prints from my 120 film in the next two years?
If no, get the Epson. Batch scan, retouch very little. Spend the 2000 on a new Leica or lens.
Plus the 4x5 scans are some of the best I've seen period. So spend the 2000 on a field camera.