Apologies for having had Saturday morning off. Thought it would be rude to ignore my house guests by going online; now they're out in the sunshine, I can rejoin you all.
Firstly i'll tackle crosstalk; I wonder how many people who bandy the term around really know what it means, let alone what it actually looks like!
Crosstalk is when some of the 3D info/elements meant for one eye are relayed to the other (and vice versa). This can lead to a halo effect around objects.
There are many variables, but in summary the faster the panel the less potential of crosstalk. So, plasmas- with their ultra-fast response times - are less likely to suffer from crosstalk. And as our review of the VT20 states, we didn't see any at all: "the Panasonic's [3D] picture is as stable and sharply defined as any we've yet seen, and seems free from crosstalk".
The Sony HX903 is the most plasma-like LCD we've seen - aided by its new-generation panel and full LED backlighting. It's got a smoothness of motion and deepest of blacks we simply haven't seen on an LCD before.
Crosstalk was also negligible; nothing of note in our testing. And in its favour, the 3D picture was crisper, dynamic and with none of the occasional colour-banding issues we found on the Panasonic.
This is why we stress and stress again about testing sets for yourselves before you buy - and that's never been more important in the TV world as with 3D, when we all can have a reaction for or against a product for a range of reasons.
Some people may find any crosstalk unacceptable. Others may never notice it - just as some people are sensitive to motion-processing whereas others are oblivious.
There's also the issue of comfort/fit of glasses- especially if you already wear specs yourself.