It seem to me that many of the succesful hunters own and use the 10x12 coin to the point I can't get my hands on one. what is it that makes them so popular also I've see some of the Ultimate 13 up for sale but I also see other loving them. I already have the X5 because when I called KellyCo last year they didn't have the 6EQ,, 6x8 or the 10x12 in stock and couldn't even give me any Idea of when I could get them. I like the idea of the 6x8 over the X5 even though its an excellent coil only because of more coverage than the X5. I also wonder how many of you use your 10x12 more than the stock pro coil and why. I'm ready to buy the 10x12 or the Ultimate 13 if I can get my hands on one. Which one do you prefer. If I had to I would even try the 6x8 just to get better coverage and depth. Your advise would be appreciated.