Do you guys think that its worth it to get the X50 if you already have an original 8500? Im not sure if this is right, but wasn't the reason the X50 was made was because there was a hardware revision that needed to be made to the original 8500 to be able to detect POP? But, from what I've heard is that most people don't even have POP enabled. Also, I know that the Ka range has gone down, but the K has gotten better on the X50. Couldn't (or more like SHOULDN'T) they make another revision for the 8500 that adds on the increase in K sensitivity or was this part of a hardware revision? I love my X50, but am wondering whether or not it would've been more worth it to buy an Ebay (I know) 8500 and purchase one of the extended warranties on it for over $150 less than the X50.