The T-Road Pearl is definately a backend monster -- long and strong.  If you can find one (easier said than done since they are discontinued), a Paradigm Domination also fits the bill.  When it comes out, the Rapid Fire Pearl should be pretty strong on the backend as well -- it'll have an inverted version of the same core as the Spit Fire, but with the stronger R2S Pearl coverstock that's on the T-Road Pearl)  If you want something that's still got good length, but reads the midlane a little more and has more continuous motion through the backend, the Gravity Shift is a great option.  One of my friends threw somebody else's yesterday for about five frames, and immediately ran to the proshop to drill one up for himself.

I throw a Fired-Up, and it is a killer on the back end. I would suggest you get either it or the only thing I throw that's stronger (the Visionary Green Gargoyle), but they are both discontinued. I am not too current with Storm equipment, so I couldn't suggest a good alternate to the Fired Up.

Big Willy Style
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Just my $0.02 so take it for what the Foreign Exchange values it at!
"I was raised by a cup of coffee..."
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Rapid Fire Pearl or a Hammer Vibe (Blue/Cherry/Emerald doesn't matter)
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Blue Vibe