desperately need suspension

well im about tired of how rough my truck rides with the current setup that the previous owner did..so im ready to start buying some suspension parts and would like some advice on what to go with or who to call and talk to and order from. was thinking icon or king coil over up front and matching shocks in the rear. will i have to get new ucas? if so what brand? also torn on the rear leaf pack should i go with the deaver leaf pack or with the dakar pack? truck rides like a wooden wagon front now with cheap coil overs up front maxed out and a spacer block in the rear so im sure anything will
be an improvement just wanna spend my money on the right stuff