I've used Track before, but when I started out using Brunswick products, my average started to skyrocket. I haven't tried the DV8 line yet but I believe they're in the same category as the Brunswick and Roto Grip. I've only had one Storm ball and couldn't stand opening my bag and getting a face full of smell. Couldn't stand it. If one of my students owns a different brand, that's ok, I work with it. I usually will recommend upgrades by referring them to Bowlingball.com's perfect scale, as I believe it's a simpler way for bowlers to judge the differences in the balls. And no other site does that.