As far as buying one sight-unseen is concerned, here's a couple of anecdotes that are making me seriously consider (pre)ordering one:
I was at a home theater store yesterday (Barrett's) and asked if they had the 50A10 in stock. They didn't - they're supposed to get them in on Aug 12 - and then I asked about the 42A10 and we talked about some things and to make a long story short he actually suggested that I order the 42 on the Sony site since he said the Sonystyle price for the 42 was pretty much their cost and that he's seen this in the past with Sony where once the unit hits the shelves they pop up to MSRP. So, that got me thinking. Afterall, why would the salesman suggest I go and buy it elsewhere?
Then, I spent some time looking at the 42WE655 (the "42A10 predecessor") and the 55A20 (which at least shares the new Wega stuff as the A10) and these sets looked great. And, I noticed a better picture on the A20 than the 55whatever655predecessor model next to it.
So, the way I see it is that Sony knows what they are doing when it comes to these LCD rear projector sets. The outgoing 42 looks great so I would only expect greater things from the 42A10 plus comparing the 55A20 to the outgoing 55 model indicates that Sony has indeed improved things even without the dynamic iris. Throw in the salesman's statement about pricing and throw in the fact that I have a Sonystyle store within 30 minutes of home making it relatively easy to return the unit if it turns out to be a dud, and I'm seriously considering preordering one of these puppies.
Can anyone talk me out of it? Seriously, please try - I might learn something.