I know I want the 2/4 drop but i am seeing so many kits that have spindles, or not spindles. leaf springs, or not. Its confusing. I dont need new shocks bc my truck rides like a dream already. What is the best setup (kit)??? BTW I was not wanting to spend more than $450. Thanks

 

If it were me I would do drop spindles and shackles. Mine is lifted and I did lift spindles and shackles.

 

The drop spindles up front will give you a closer to factory ride, and you can keep your current shocks. With springs up front, you will need shorter shocks, and give you a little bit of a stiffer ride.
For the rear, I would go with a flip kit. Most of them come with shock extensions, so you can keep your current shocks.
I am installing McGauphys 2" drop spindles and 4" flip kit this weekend. I'll let you know what I think of it.