I have been listening to the Bent NOH in my system for a bit over a week now, and am very pleased. Given that I was running a resistive passive preamp, I knew that it would 'work', but did not appreciate how well it would work. A very nice upgrade to my system in a number of ways !!
I can't imagine any reason that I would be looking for a replacement preamp in the future. The fully passive nature of the NOH is also a important feature to me (no electronics to fail).
regards -- Roger