I just got the 605 recently at BB. It was on sale for $499. I am 99% sure the body is plastic. It has faux chrome trim around the edge. I would probably actually prefer it just being black. I don't have an X yet (maybe BF sales) but so far I like the TV and it is pretty easy to use. Not a big fan of the volume controls on the side of the remote. I hit them all the time. Really minor issue though IMO.
Mine had the 605 in stock but neither car I had was big enough so I had them deliver it. Of coarse their truck broke down on a Saturday and I had to wait till Tuesday.
Rough with the delivery. Hopefully I can trade my car with a relative because it won't fit in my car and am too impatient to wait for a delivery. The controls seem like they would frustrate me too. I usually use the xbox media remote to control volume if I'm not using my soundbar but for some weird reason the X recognizes my TV but puts in a different remote code than what my S had and when I put in the code that was on my S I still can't control my TV with my X. Media remote controlled my TV no problem through my S, not sure what the problem is with the X.