As far as the cold air intake, I installed a Spectre. I wanted one with a big filter and something that would truly be a "Cold Air" system. I thought the Spectre was the best. the install was a bit of a pain in the A$$. I had to tweak the aluminum bracket quite a bit. then a few weeks after the install an O2 sensor went bad which made the truck idle rough and stall, I don't know if this was related to the intake but everything is good now.
Here is a link to the one I bought...
If I did it again I would get the Spectre Profab. I thought that was a great idea they had!