If you like the light guage Pressurewounds but want a 5 (or 6) string set, you might want to look at Ken Smith Compressors. It's my understanding that these are actually GHS Presssurewounds as OEM for Ken Smith. There's a taper core option available as well.
I really like the light gauge Pressurewounds; have them on two 4-strings. I may try a 5 string set on my MTD 535 since there's a taper core option.
Yes, the Ken Smith Compressor 125B is taperwound at the ball end. The only thing to keep in mind is the tapered portion is 2.5".