I sold Nautilus and they can have a nasty impedance dip so a decent 200 watt amp would be in order.Some think them a bit dry but others love the Class D sound and watts for bucks the Wyred amp is hard to beat.Runs cool and won't need second mortgage.The B&W are pretty easy to match with variety of amps IMHO it least compared with other speakers.I always like used Bryston.But in any case I kind of think those speaker outclass the very good Denon but if not going into mega bucks separates than a good amp couldn't hurt.
Chazz
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