Sony Bravia 32" EX400 Vs. Sony Bravia 32" EX500? Question about my Television?

[The_Basterd]

32" EX400: http://www.sonystyle.com/webapp/wcs/...:dg_tv_gglsrch
32" EX500: http://www.sonystyle.com/webapp/wcs/...:dg_tv_gglsrch
Ok, a month ago (Edit I looked at receipt 48 days ago!!! Time went fast... Am I screwed?) I went out to Best Buy searching for a Sony Bravia 32" TV. I spoke to one of the employees and asked about it, and he showed me the EX400. He said that's the newest and best quality tv they had in the store and in my price range for what I was looking for. I was pretty much on set for looking for a Sony television.

My price range went up to about $720. I randomly did some research on the tv I bought just now, and realized there was a tv out at the same exact time as mine, that I think might be better.
I am not the best with knowing the specifics of quality.

I was at the store for awhile, and he never showed me the EX 500.
Comparing to the EX 400, is the EX 500 any better for watching movies on Blu-Ray's (like especially with picture quality)? Are they the same in picture quality? What makes them different? Is it a better television?
Oh and in the past week I see the prices went down on both tv's......

I see the 32" EX 400 is 60 HZ and the 32" EX500 120 HZ.

I called Sony and asked, but she didn't seem to sure of herself. She said it only matters with football, and the 60 HZ and 120 HZ is the same exact picture quality when watching Blu-Rays as long as you use an HDMI Wire.

If the other one is actually better, is it worth going to Best Buy to try package everything up, and try to exchange it for the EX 500. I would tell them the truth, their employee (Who I actually always see their, and can point him out ) never told me about this television, even when I asked if their was anything better.

He just told me this is the newest one they got in and the best one they had in my price range (which is untrue now, maybe because he didn't know about it?), and I just saw they had this in as well. If this is in fact a better tv (for my main use for watching Blu-ray's) for watching Blu-Rays I would much rather have this.
Thanks in advance for your help in advance,
The_Basterd