Now for my own question:
My PK550 has 2 dead pixels, and this is the FOURTH exchange I've done on it.. I believe LG's QC system is a bit weak.
Can anyone vouch if the 50PK950 has any performance improvement over the 50PK550? I currently have the 550 and I'm considering returning it and getting the 950. There is a price difference of $400 (and I can't buy it locally, I have to order from Gibby's, meaning a more difficult return/exchange if necessary) though and I'm wondering if there is a moderate performance difference on top of the obvious aesthetic improvement. The 950 is much sexier, but I don't need the extra features (internet stuff) since I have it running on a HTPC. So I'm purely looking at quality/performance. If the 950 is better for the extra $400 then I'll do it.
From what I've read, I am deducing that: the 950 has reduced glare over the 550 but the 550 has an ever-so-slightly better picture. I'm not overly concerned with glare, because I have a dark enough room to watch in. I'm interesting in pure hard data with respect to contrast, brightness, colour accuracy, etc. (and maybe relevance to what the naked eye will notice).
I might even consider the 950 if it is equal in PQ to the 550... I think the sexiness of it is enough to go on if that's the case lol. If the 550 still takes it for PQ though, then I will save the 400 boners.