I used bilstein 5100's for the tundra on the front;
Bilstein shocks and struts for cars and trucks - Shockwarehouse.com
And standard bilsteins on the rear. I set the front at max height and put a daystar spacer and air-rite 1000's in the rear. If you're spending as much as these spacers seem to cost just get the new shocks. I installed everything myself and put on some 285/70R17 BFG's. I think the ride and handleing is better than stock too. I found all 4 of my factory shocks were junk and after 6 years if yours are factory they probably are too. Both of my front shocks I could not pull into rebound position after compressing them by hand, this was exactly what I suspected from the factory shocks, the truck was ok on speed bumps but potholes could knock your teeth out. If your factory shocks are sucking the spacers will intensify the effect I bet.
BTW - I wheel my Seq too and I've had no computer issues. My truck had the zero point calibration done not long before the lift. Although no one seems to confirm it I bet if your settings are a little that's the reason the computer will trip when you add the lift and bigger tires.