I'm back home for the holidays and managed to bring the subwoofer home with me (the ASW675) and I ended up shipping the DM602 S3s home for around £340 :-o
I've got it all hooked up and more or less tuned. First impression: WOW. This system has tons of power to offer and the clarity is astonishing. I'm really glad I went with this receiver as I seem to be filling up all the available inputs...
The remote's learning function has been abused to the extent that it now controls the TV, Satellite receiver and soon enuff the VCR (I know that this is legacy, but Mom wants it

). I didn't bother learning the PS2 functions but I might program them in, only a few are needed for basic DVD control. I use it to play R2 DVDs, while the Mac mini plays all R1 DVDs.
Seems like I'll be able to interface the gamecube and xbox360 as well (when needed)...
I had to leave the DM601 S3s behind with my buddy Tom as I was really over weight and ended up checking in around 55kg of luggage of which 32kg was the sub and its suitcase.
As improvements to the system I may end up swapping the receiver - plasma cable from composite to component. I'd think that S-Video (digital) is better than composite (analog) ?
I've already decided to pass the output from the xbox360 directly to the Plasma's component1 input.
Edit: I'm a muppet. For the past few days I've been plagued by an issue with my sub. It would *randomly* cut-out, so I decided to run a few tests to try and isolate the problem. I tried everything under the sun, from keeping it cool to patting it, screaming at it and finally I switched it off and connected it directly to the mains supply so that it bypasses the 1kVA UPS it was initially connected to. So why a UPS, well it makes sense, the sub doesn't need to be run off a battery but this unit does offer very good power conditioning BUT......only 4.6A @ 240VAC!
...it is operating perfectly right now...but I need to look into a power conditioner that can source at least 12 - 14A @ 240VAC.
--Mike