Originally I wanted to get TX-P46ST30B, but 50" version is now cheaper than the 46", weird! Anyway the girlfriend keeps telling me that bigger is always better (?) so we are looking at these 50-51" sets. The ST30 has now dropped to D550's price point (I've found both on the high street for £700 including 2 pairs of 3D glasses!). So I was wondering which one really is the better buy.
Although we will be watching HD movies, most of the time is spent watching SD content (25Hz/30Hz xvid files + Freeview). Apart from the usual news/documentaries/dramas we also enjoy watching sport, particularly F1 & BTCC. I'll also be using the TV for gaming (Xbox360, PS3, Wii & PC). I've got an old 5.1 surround system, and it looks like I'll be using the TV's optical out to feed into the amplifier.
On paper the ST30 should be ahead. But on the forums the ST30's reputation is tarnished with much talk about the the green splat + 50Hz bug issues, and many prefer the D550. I've tried to demo these in various stores to try and see for myself the foibles of both these TVs, but the store lighting and the lack of aerial feeds make it difficult to make any real world objective comparison. Oh the agony of choice!