I don't know what you are planning on performing, and I am not sure what soft has anything to do with being able to perform.
I started off with Kennedy Halves, went well for me. I moved on to Eisenhower. Through many changes, now I am onto Morgan silvers.
Each coin is different than rest, but in terms of performing, they make very little difference.
Yes, soft coin does make it 'quieter' to leave you a little more room for mistakes, but I also don't know enough coin effects that REQUIRE soft coins to be able to pull off.
So, the point of my post, go with what you can afford. One coin ain't better than other (aesthetic, maybe, better, arguably not)