after reading this and the other thread, I decided to set the manual delay back to 0, and see what happens. I also had the automatica delay setting on the whole time, so maybe the manual setting that I used wasn't even being used at all. The only thing is, with my setup, I get my tv from over the air, so no video runs through the receiver, but the tv's audio is right on regardless. But I do have HD DVD and Bluray (PS3) players to test video lip sync on and so far they both seem to be correct, and I don't have any issues. I still need to try a standard def dvd to see if there is a lip sync delay due to the upconversion/video processing. I'll try to remember to do that this evening, if I don't see any issues there, I would say get the 1800 hands down. So far it has been every bit as good as my RX-V1600 and then some, even though it costs a bit more. I got mine on Ebay for just under $900 shipped, I figure the ~$300 savings was worth losing out on the mfg. warranty, since yamaha builds solid receivers, and my 1600 never gave me any problems. I also forgot to mention that my PC audio runs through the receiver and the video cable (VGA cable) is ran directly to the PC input on the tv, and there are no lip sync issues there either, so I don't know if the receiver is doing anything to correct a sync issue, or if there is no delay to begin with, but so far every source I've used seems to have no delay issues, so I would guess the receiver is doing it's job properly.
