I've been looking for a string totally brighten up my sound. I've been using roto 66 and 77's. I went to flex steels and was really happy using them. I was turned on to these from my local guitar store and honestly was not expecting them to be much better than my flex steels, Wow was I wrong!
Go out today and buy a set of these Slinky Colbalt's try, I promise you'll be HAPPY!