I just bought the Mits WD-57732 and it's a fantastic set. If you get a chance check out AVS Forums. The link below is a discussion of the Mits WD-xx732 TV's. You should be able to find discussions on the Sony as well.

http://www.avsforum.com/avs-vb/showthread.php?t=722383&highlight=wd57732

I did consider the Sony, but the Mit's won me over.