I've heard (and read) that in terms of technical superiority, the Plasma's are seriously overrated. They're just "wow" devices right now, nothing more.
I'd say go for the more square inches in the 60 inch.
They still haven't refined the plamsa TVs, from what I read, they still can't really show true black. Instead they show nothing which, getting really into it, isn't the same thing. Since a Plasma TV sounds like a technical marvel, that sort of kills it's appeal (IMO).
Regardless, congrats on the new TV, whichever one you choose <IMG SRC="smilies/smile.gif" border="0">
(and you'd better show us a picture with a Neo Game being played on it!!!) <IMG SRC="smilies/glee.gif" border="0">