Generally I'd say the Noritsu Scanners yield the best results for time spent for 35mm/120. I'd say results wise they are 90% there compared to Flextights with the added benefit of having some ICE capabilities (the infrared readout for dust masking). The Noritsu 1800 is probably the best scanner on the market right now though it's price point certainly reflects it. We have about 4 in production.
That being said our favourite machine is the Fujifilm SP500 which is a dedicated 35mm Scanner, with superior ICE capabilities to that of the Noritsu though not as sharp but I'd say has about 80% as good as the noritsu though the Fuji do have a nicer colour science. We have about 16 of these guys.
The Flextight honestly doesn't get much use because it is far too slow of a workflow. We've had about 3/4 different models throughout the years all SCSI. I haven't used any of the new ones. Though honestly I don't think they are worth the time. The need to cut the negatives to use them alone is prohibitive and makes it more of a tool for special circumstances in our opinion.
I have yet to use many drum scanners or the fuji highend flat bed scanner but if someone has any to play around with one I'd like to give em a go.