I don't think you can go wrong with any of those. If it was me I would look at the Denon the longest then the Marantz and then the Onkyo. No real reason for that other then I own a Denon 3805 and I thought it was an improvement over my Onkyo 800. The Marantz I have never had but I have heard a lot of good things. I would also second the idea of taking a peek at HK. Although.......do they still have those dam fans in the back?