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Since you have already decided to spend the cash on a Nils, go for the 8". It drills holes just as easily as a 6" Mora. I have the 8" Nils; my son has a good 6" Mora and he borrows my Nils if I am not using it. The 8" gives you more space to avoid getting tangled in a depth finder transducer cable, shrinks less when the holes skim over, and makes it easier to line up and pull a larger fish through the hole.I have used 6", 7', and 8" Moras, a 6" Lazer as well as an 8" spoon auger. With the Mora's, I used to drill a couple holes to get warm. With the Nils, that doesn't work. I now have to light my heater to get warm. The 8" Nils is my choice.