I need some help

[the004slayer]

Hi everyone, I'm new and I'd like some help from you all. I'm planning on buying my first HDTV, but I really don't know which one to choose. I've come to the conclusion that it has to be one of these two...

http://www.sonystyle.com/is-bin/INTE...l_26%22to42%22

http://www.sonystyle.com/is-bin/INTE...v_42%22to51%22

I like the 40" Bravia more because it has the ability to be hung up on the wall, but it doesn't have the SXRD technology that the 50" Grand WEGA has. Does the SXRD technology improves the video/audio quality much more than what the 40" Bravia already has? If someone could help me out with that I would really appreciate.

Other thing is, I know that for viewing over-the-air programming you need two things besides the TV, a tuner and an antenna. Since both of the TVs above have the tuner already integrated, does that mean that I can use the HDMI slot that I would normally use for the tuner on something else, such as a BD player, without worrying about not having HDTV while I'm viewing the BD, or do I need the HDMI slot for something else?

Thanks in advance for any help you guys can give me.