If you can get one in good condition, I’d choose the 50 watt Marantz from those you list. I’ve got a Marantz dating from 1993/4 and it still works, though it needs a service. The PM6010 is almost ten years newer and worth a punt. A cheap example with no remote for £65.
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However, the Denon is another ten years newer, 2009-12, so is likely to benefit from being more recently made. It’s fractionally less powerful at 45 watts, which isn't significant. The condition and the credibility of the seller would be relevant too.
I think they both had remote control, so knock off something if it’s missing.
I‘m less keen on older Cambridge and the phono board was an option. It doesn’t seem to include a remote though is reportedly quite well made. 60 watts per channel.