That's a hard one. I guess it depends on a combination of things, like what lenses you are using around it, what you like shooting and if 60mm and macro ability is better for you compared to a slightly wider, faster lens like the 45mm f1.8.
There are so many prime lens combinations. Right now, my favorite grouping is the 12mm f2, 25mm f1.4 and the 60mm f2.8. If I were using the 20mm f1.7 instead of the 25, I might want to have the 45 instead so I did not have the slightly larger gap between 20-60mm.
Both the 45 and 60mm lenses are outstanding. Speed and size are the 45's advantages, although both are light as a feather. The 60mm lens gets you way, way closer with the 1:1 ability and I'm seeing little to no fringing that requires correcting with the 60. It really is an outstanding lens.