i got me a 4 1/2 in die grinder a while back and its probubly the most vital tool i have in my bin specialy if your taking apart an old truck far as what disks to get i would say get a variety pack from harbor freight tools lol i use a hell of alot of the thin waffer disks for various cutting choirs and for surface smoothing on thicker metals and weld seams thicker ones work well for that i wouldn't go with a large grinder the smaller hand grinders can get into smaller area's and are generaly more useful
