I will tell you for sure that the 6850 is easier to find used than the 6855. I think that is because most guys buy the 6850 over the 6855 to get the 2 batteries, so there are more 50s out there. I have a green 6850 myself. I have only used it a few times, but I will tell you that all you have heard is definitely not hype...it's a beast.