Which harken mainsheet system should I purchase for a nacra 6.0? I am about to purchase the boat and it doesnt have a mainsheet system on it. I was thinking about going with the 8-1 but am very unfamiliar with the boat. Thank you for any help.

8:1 was the stock system and would be fine for that pin-top main. 9:1 or 10:1 will let you sheet harder more often and for longer, but it'll be a trade off in quickly sheeting out, which is important on that boat when going downwind.

Congrats on the new boat! Pics!!