SSS can be good too, it just takes them longer to be 'in the green'- or making you money. This guy is one of the few that's actually netting me something right now -HEE Click-
Specifically for showing, I think a lot of people go for E geldings. They train pretty quick, but don't level up as fast as a W. So I have a lot of PEP/EPS/APE geldings for example.