Steve,
I draw 29 3/4 inches and shoot the 60 inch Dalaa just fine.I did OK last year shooting 3-D.I tied for third at one shoot that had over 600 folks registered.Not that they all shot in my class but I still improved my scores a lot since I started shooting the Dalaa.
A little bit after the 3-D season I bought an Elite 21 inch DAS.The only reason is that I want to get real serious this year at 3-D.I felt that the extra length of a 64 inch bow and the extra performance of Winex limbs might give me a point or two in a match.
Your draw length would have a lot to do with how each length riser feels and performs.