Two inch billet spacers are no good when coupled with Ome springs because they give too much lift.
However, they are infinitely more durable than the plastic ones, which compress over time.
While they are cheaper than a full lift, they don't perform as well. All in what you intend to do with the vehicle.
1995 4DR Sidekick 16v w/4spd Auto J-Vin 197k
4.5in Low Range Offroad combo Lift
2.25 Piping with Magnaflow exhaust and cat
Many other things...
1996 Geo Tracker 16v w/4spd Auto Canadian 110k
235x75xr15 General Grabbers on Cragar 15x7s
2in piping Magnaflow Exhaust and cat