a 70" bow will draw smoother than a 60" bow,,,,,,and even though these posts will get bias because MOST of the bows made be reputable bowyers will draw smooth to their tillered draw length,,, what length bow and what style R/D bow are you interested in?
I personally like smooth but stout feeling,, I need to feel that weight building up maybe 2 1/2#'s per inch of draw,, I do not like when the forced draw curve is un even coming back..
I cannot mention my absolute favorite because it is not R/D but the 2nd choice would easily be my old and long gone 62" Thunderstick 3 w/ osage limbs,,, 2nd is my 64" Baraga with flat grain elm limbs,, and this is based on a perfect feeling forced draw curve which defines smoothness to me.