i like 452x rob. like 8125 its pure dyneema, but there is a strand of vectran inside each strand of the 452x. the added strength of the vectran allows each strand to be thinner than 8125. its a few fps slower than 8125, but really, really stable. in fact, you don't need too much tension on it while serving to keep it from seperating. 20 strands will do for 70# and under. i don't use any brownell stuff. i used to use their serving but you can never get the same color twice and sometimes its great, and somtimes there are fuzzballs every couple feet.