Just a head's up for people like me out there with no Costco nearby or just want to save a buck or two...
I had been checking this set out vs the LG 55LW5600 which is also comparable in price online. Turns out as mentioned in a post above that the 633 appears to be a big-box targeted model that doesn't crop up often online.
However, Amazon does sell the 632u which is the same set with 120hz instead of 240hz. 240hz didn't mean much to me so I bit on the 632 from Amazon for $1372 + 4-year Squaretrade warranty for $169 = $1542 and change.
Anyone who might want to see the set in action, my local Sears and Best Buy both had the 632u on display. FWIW, Sears seemed to do a better job with it, the BB display looked like utter (expletive deleted).
There isn't a whole lot of info out there on these other than user reviews. I looked at all the negatives people had to say about the set and hit Sears to try and find any of the flaws mentioned and I really couldn't find anything. Flashlighting wasn't and issue, didn't notice any clouding either. Viewing angle was surprisingly good for an edge-lit. Colors really popped and weren't overdone. It was honestly one of the best sets I saw on display at Sears, which was also very dimly lit so bleed and clouding should have shown up if they would be a big issue.
Anyways, just my 2 cents, hope it helps someone out there.