As Alan made clear, Samsung, but his is from the perspective of sheer videophile performance and nearly all calibrators agree. I own two myself and from what I heard there may a be a third in my future... JKP/Samsung joint venture 1080p like they did with 720p ala SPH710AE.
The flip side of this is getting a Samsung fixed under warranty. I thought I had posted my personal experience about getting one repaired, can't seem to find it, but recall something like 4-6 weeks to get it back, DLP front projector, after being told 48 hours not including shipping. Samsung has also had problems within the US service industry due to low rates, numerous hoops we are forced to jump through to get paid and unpaid claims that should have been paid. Ultimately this means oddly enough that getting a Samsung fixed under warranty is far more difficult than out of warranty. Per my service elders

, the Koreans are going through the same thing many Japanese companies went through in the 70's, getting acclimated with US business law and how the US service industry does business. Many do not know this but the US is unique in our legal requirement that products must carry a parts AND labor warranty; for most countries it is parts only and that creates a disconnect for outsiders. Samsung used to have a bad parts problem, have healed that and I hope the same occurs with warranty contracts and administration.
What this leads to is that well known Japanese brands such as Toshiba and Mitsubishi for DLP have a clear track record of getting customers and service centers taken care of and you should not have a problem finding a service center near you.
So choose; a videophile performance response with Samsung or casual viewing response from the others. Either way, ISF calibration benefits all of these products but only the Samsung DLP can meet the demands of performance oriented videophiles seeking adherence to video standards on the screen.