I've seen and heard this amp in action and was very impressed!!!
For it's price point I'd say it gives the Denon 1910 (which i have) a run for it's money at least from an audio perspective...
I've only seen it demo'd with a live music DVD - but i was amazing at the sound quality and especially with the separation - you could really hear each individual instrument..
I know my local retailer (who stocks both) rates it above the 1910 and a mate of mine bought it just before christmas, chosing it over the denon...
I had heard stock levels of the marantz were low and because of this they were delaying releasing it for review as the expected strong review would cause a level of demand they couldnt satisfy, but i guess the WHF guys could throw more light on this....