I'm running a Smarty with the Comp and I love it...especially the new Smarty software, has 6 settings for your torque management. But a stock tranny wont live very long behind it, especially if you're pulling with it. Mine lasted about 10k daily driving.
Also, go for as much high performance tranny upgrades as you can afford, as soon as you can afford it!! You may not need a full billet tranny now, but you will once you start making more power, and then more power, and then even more power. my $0.02