Where do you live? Hook up with a local club, talk to people who have done each lift and get their first hand opinions. They can also help/teach you how to install it. Doing your own installations/service work is very rewarding, saves a lot of $$$. You'll also love your truck more since it is your sweat that built it, and you'll know how to fix it when you break it.

You need to know how far you want to go and plan accordingly, if not you will be wasting money.

good luck.