Interestingly enough - prices have been all over the board for these guys.
Best Buy appears to be charging FULL MSRP for all of the above mentioned TVs. Amazon has been pretty aggressive, but their price for the LN40A650 has actually been going up.
I just got a 12% off rewards member coupon from Best Buy, but I have to use it this weekend... which sucks because their price is already rediculously high. I'd rather use it in conjunction with a price markdown.
Oh well, we'll see what happens.