just remember, the Smarty does a great job in the lower power range, but it won't compare to the TTPM in the upper range. If you do go with a Smarty, try it with and without the TTPM. I think you'll be surprised. I've run my Comp alone, my Smarty alone and both together. The overall power range is best with both units, but (TO ME) driveability is better with just the Smarty.