The Coolscan 9000 is, I believe, the best scanner that has ever been built under a $1800 price tag for 35mm and 120 film.
I agree.
I also have the 5000ED and 9000ED and you're not going to find a better scanner this side of the cost of a small car.
The 5000ED is probably the best sub $1000 scanner around. Unfortunately the 5000ED does not have a glass carrier. The FH-3 neg holder makes a big difference, especially if you pre-flatten your negs. But soft corners can be a problem.
THe 9000ED is superb. The next best unit was the Imacon 343, that was almost 3 times the cost, but most people I have spoken to said that you may be able to see a difference in an extreme case, but 95% of the time the Nikon is just as good. Now with the 343 out of production, the cheapest Imacon is around $8,000.
The trick with the 9000ED is to get the glass film holder. This ensures perfect sharpness across the frame.
One great feature of the Nikon scanners is that they use LEDs as their light source. These are very stable and last for an extremely long time. The LED light also provides a very crisp light. The difference between a scanner that uses LED and florescent lamps, is like comparing a condenser and diffusion enlarger. The Nikon is very sharp.
The other unit that I recommend is the MICROTEK ArtixScan 120 tf.
A friend of mine has one of these and it's very impressive. It comes with glass holders for all formats from 35mm to 6x9. I've seen these for about $1200-1400 new
By all accounts the Minolta Dimage Scan Multi Pro was a masterpiece, but obviously they are no longer in production. But there still are a lot of people using them The problem is that it uses a florescent bulb, which has a limited life span. You can get replacement bulbs, but it's not simple.