Sony KDF-55XS955 vs KDF-55WF655 vs KDF-E55A20....Please Help!

[83dawg]

For months I have been lurking forums, researching and looking for a big screen HDTV. I have narrowed it down to the 55 inch Sonys, and (until the new unit-KDF-E55A20-came out) had narrowed it down to the KDF-55XS955 or KDF-55WF655.
I would REALLY appreciate some of your guys comments / suggestions on which of the above three (3) I should get. Does the new model improve picure quality over the old? What are the differences?
I had about decided on the KDF-55XS955 because it has two (2) HDMI inputs---one for my HD satellite receiver and one for my upconverting DVD player---but did not know if the much higher price was justified.
Thank so much!!!