Hi,
I don't know these products directly but the BIG word at the moment & for some time be it:TV,AMP,PROJECTOR EXT is "HDMI" you just can't have enough of them if you want to keep all the HD benefits that it will give you plus with the items you mention HDMI would be a must for your 360,
One last thing though!,
I would give a decent make DVD PLAYER UPSCALER a look, it's a cheap way of (NEAR HD) that will show all your old DVDs much better & for around the same cash too but it all comes down to your own budget,
Good luck.................& enjoy! ;-)