I don't think that your expectations are too unreasonable Will. Here is what I would do if I was in your situation:

Get some front Old Man Emu springs (PN OME 99A/B- they run about $200) and matching rear springs (PN OME 17- about $275). If the rear springs are too much for your budget, get a full length add-a-leaf, such as available from Rancho (PN RS60622) and a little bit longer shackle for the rear from Budbuilt, All-Pro, or Sky Manufacturing.

You will likely need new u-bolts and new spring bushings, so do not forget about those. Don't forget about shocks either. I use Doetsch Tech shocks on my truck (Prerunners in front and MV-12s in the rear). They are inexpensive and work well. Bilstiens are a great option but expensive. I think that most lower end shocks, like the Rancho RS5000, are valved too firm for a light pickup.

I hope that helps, if you have any more questions just ask.