FWIW, I have a Sony 50A2000 SXRD that I bought in 2006 that has convergence problems and purple haze problems. As compensation, they are offering me:
KDL46EX500 for $415 plus tax
KDL55BX520 for $575 plus tax
Others have gotten better deals, but my TV isn't unwatchable and it is over 5 years old. I think it is a fair offer.
I was originally going to go with the KDL46EX500 because it has been around longer and was reviewed more, but I decided to go with the KDL55BX520 instead. I think I'd regret going down in screen size.
I called back to see what else they could offer me and they said that those were the only two options. I also verified that these are new (not refurbished) televisions.
Note that although few, the KDL55BX520 reviews are overall very good. One guy posted a horrible review (can't remember where) that is irrelevant because he got the model number wrong (look for the comments posted under the review). He said he bought he TV two years ago which appears to be impossible as this is a 2011 model. Somebody else bashed it because it didn't have Internet apps (duh?).
The two HDMI port limit and lack of removable cord don't bother me. I essentially only have one source, which is an Internet-app Blu-Ray player. We only watch Blu-Ray movies and stream movies from Amazon and Vudu.