sounds like you have a pretty similar set up to my truck 2 years ago, with that kind of milage, I would look into new Tbars for the front (or a coilover swap) also make sure to get number 1 bars that come on the FX4 trucks they are stiffer and will handle the weight of the winch better.
as for the Expo springs I have run them witha 2in shackle for some time and the ride is good, they are stiffer then my ranger springs but ride well with a full tool box in the bed and my full size spare and gas cans. they did a good job zeroing out my rig basically I only gained about a 1/4 of lift from them but my shackles give me the 2in I needed to really stuff my tires in the wheel wells.
Support Search and Rescue...Get Lost
2003 Ranger Fx4 4.0 TR- DBR long travel, Deaver G50, 305/70R16 MTRs, Supercharged, C4x4 bumpers, super sliders, 10K winch lots of lights and radios.