Of course he liked the Creek more than all of them.
The conundrum is this, why is he selling it?
That guy is plaguing himself with thinking there's a better sounding amp than what he already has. The worst kind of upgraditus to have is one that doesn't present a significant advantage.
The only reason I might suggest trading up is if the Creek has a significantly higher output wattage than the NAD. The NAD can certainly handle virtually any load from all but the most difficult to drive speakers. An additional 5 watts is absolutely nothing, and I'd chance the NAD has higher headroom which will give it an edge with dynamics.
The specifications of the Creek seem to indicate it doesn't offer as much power on lower impedance loads than the NAD. It's slim design doesn't aid it either, since both are of the class a/b order it's going to be more difficult to get the same amount of "beef" the NAD has.
If anything, I'd say it's a downgrade. Getting a separate amplifier to use in conjunction with the NAD (being used as a preamp in this case) would provide more significant results. However the results would only be evident once you push the "envelope". (did you see what I did there?
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What's the asking price for the Creek?
