Right now (and for the past 2 years or so) I am using D'Addario EXL170-5 strings. I have tried a few different sets by other manufacturers and don't like them as much. Here's where my problem comes in. I want to try a set of strings with a tapered end (preferably the B and E, but just the B would be fine too) since I have heard good things about them improving sustain and clarity. I would like to find a set of D'Addarios that are tapered but have so far had no luck, so if anyone could name a set of D'Addario tapers (Nickel Roundwounds only please) or another brand that is as similar as possible to the EXL170-5's please do so. Thanks in advance.