Pros and Cons of coil-overs?

I'm in the market for some new shocks all around, and I've heard a few things about coil-overs. In what ways are they different from regular shocks (other than the coil-over)? Pros and cons? I saw a recent post of a guy that installed them and removed the rear coil springs. My 93 is a daily driver with slight rubbing on the rear tires (285/40s) despite fender rolling . I want a decent ride quality, but no too harsh. What shocks other than coil-overs would you all suggest?

Thanks-
Hawaii-50
 
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