I agree with steamloco76, I would keep the 17-3 and save toward the purchase of a 617. However, if it absolutely has to be one or the other, I'd keep the 17-3. I personally like the 6" barrel in the no lug guns and the 4" barrel in the full lug guns, those combinations just seem to balance the best for me. Two of my favorites are this early postwar K-22 and this early 617 no dash. As for accuracy, I don't know how your 17-3 shoots, but this old K-22 thinks it's a rifle...