For me, it's a toss-up between the X-Factor and the Inferno. My X-factor just seems to work well on most house league conditions I encounter. OTOH, my Inferno seems to shine on the tougher stuff, such as sport patterns, PBA, and other tournament patterns. For that reason, and because it is the absolute best Brunswick ball I've ever thrown, I'll give my vote to:
The Inferno
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RW (THB)