I have read a great deal of this thread, though not every page as it is too long. I happen to own the HLN617W set. Mine was 4 years old back in October 2007. I bought the extended warranty because the whole DLP RP technology was still rather new in 2003. I took advantage of the extended warranty about two months before it expired in October 2007 and had the color wheel and bulb replaced. I know that there were those who had various issues with the HLN series of sets. I personally have had none! The color wheel screeched one time for about 30 seconds which prompted me to use my extended warranty as previously mentioned. The HLN617W is a 720p set and still has an excellent picture from HD over cable using component connections. An up-converted, standard DVD through an Oppo DV971H still looks very close to HD using DVI.
My point in all of this is that I am truly sorry to hear that Samsung is still having so many issues with the various DLP sets... whether they are LED or Color Wheel seems to make little difference. I too love the DLP's in general and I hope they do not go the way of the Dodo bird! The price for picture quality cannot be beat by any other technology at this stage of the game.
I would like to think that the makers of the DLP chip (Texas Instruments) would be getting involved in the quality control issues that Samsung, and others, are having in order that DLP is not relegated to projectors only.
Now that I'm looking at the possibility of the 67" LED due out in June, I am truly surprised that after nearly 7 years of DLP rear projection production that Samsung is still allowing so many sets to go out with these problems.
Hopefully they will get these issues resolved very soon, because if they don't... we all will be looking at some different technology for our future purchases.
We may like the fact that DLP is cheaper, but when you lay out several grand for anything, we should expect good quality. I personally will be willing to pay a little more for the technology that works the best OOB.