Read the reviews. I believe a good carnuba wax is leading the pack right now. Several different brands are available.
BUT, before you wax, you MUST get the surface ready to take it. If you haven't used a clay bar on your truck, that is a good starting point. I am using P21S on my Explorer and when that can is gone, will try Zaino's wax. But wax is like a good beer, the more you pay, the better the results. Check out my detail thread, I went through about 8 steps before waxing to get my surface ready and glad I did every one. But the problem is, that the surface is so good, I don't know which step really did the best job.
Also, since you are in Houston, would be glad to meet up with you and let you see my finish. It is actually smoother than glass.