I found going from a 5/8 to a 6/8 was a huge difference for me. I like both sizes and each are better at certain things; however, I like the 6/8 better I think. Round vs. square to me is a matter of aesthetics and a small bit of functionality. I prefer a point on the blade I believe (although I dull the very tip slightly). I have a 5/8 full hollow, 6/8 1/4 hollow/wedge square point, 6/8 full hollow round point and another 5/8 full hollow. I would like to own a 1/2 hollow next and think that'll be the preferred grind for me. To answer your question...if it were me again in your shoes, I'd get a 6/8 full hollow or half hollow next. You'll never know until you get something different.