Finally concluded my quest by buying the 42" Sony KDL-42W650 on 3rd May 2013. The choice was made easier by the fact that .mkv is now supported.
Went to the Sony Centre showroom on 01/05 and this set was not in stock. Asked them to let me know when it arrived. This happened on the afternoon of 02/05. Finally booked on 03/05, the next day. I didn't delay as I knew that the showroom piece would be delivered, and I was in a hurry for personal reasons. The reasoning was that even if the showroom piece were to be delivered, it'd have been on display for less than 24 hours (as it was unavailable the previous day), and in any case the model had been introduced to the Indian market less than a fortnight ago.
On the flip side, there's only one USB port now, and the set is ultra-thin so that many ports have been inconveniently positioned now. The picture quality is comparable to last year's lower -end models. One disadvantage is that at a distance of 7-8 feet, SD channels are unbearable to watch.
Thanks to all those who took the trouble of reading my posts and contributing with their valuable comments and suggestions.
At what price did u buy it.