Here is a good review of this set.
http://www.plasmatvbuyingguide.com/plasmatvreviews/panasonic-th42px60u-review.html
I have one that is one generation older and it is very good. The review is accurate. The previous post about the color being bad is bad information. Either they don't really know or they have a badly adjusted set.
I would recomend looking into the commercial line of panasonic (TH-50PHD8UK, or the newer 9 series out soon). They make the same displays without the consumer bells and whistles for less money. They also look better in my opinion because they don't have speakers built in and are just flat black.
I am assuming you do not need the speakers and tuner though. You only need the tuner if you are going to get signal over the air or without a cable box. Most people will use a cable box or direct tv tuner (to get high def) and therefore don't need a tuner. Also, the commercial models come with less inputs built in but they allow you to add any you want. The consumer models are stuck with whatever the standard set is. that may be good or bad for you, not sure.
As for speakers, I assume as a audioholics reader you probably are going to route sound through a separate system.
Also, the comemrcial models used to have a PC input built in and most consumer models did not have it. Not sure anymore about the specifics here but you should think it through. Basically, the commercial models are just displays and are configurable. Consumer models are tv's and are not configurable. You usually pay a lot more for the consumer ones as well.