96 Blazer 4WD Suspension Handling Upgrade?

I've got a 96 2D blazer 4x4. i bought it new, and have been overall generally pleased with it. I want to inprove the handling on it. Everytime I have to quickly change lanes on the freeway, there's a ton of body roll, and it feels like the truck will flip. How can I upgrade the handling? I don't mind lowering a little (1in. max), but only if I HAD to. Can you recomend any shock/spring setups that will help with my handling? Does anyone make applications that fit? Possibly sway bars, does anyone even make these for 4WD? Should I upsize my wheels at all (currently running the stock 15s)? Thanks in advance for any help.
By the way, my clips for my interior pannels are SHOT, the whole interior of my truck rattles like crazy. The stealership told me they couln't do anything about it, but there has to be some way to replace the clips...right?