American force, MKW, Alcoa, Eagle Alloy, DRIV, all make 8 lug 19.5" wheels. You can control ride quality with these bigger wheels by your tire pressure. The 22.5" wheels do not come in an 8 lug, and you will have difficulty pulling a 5th wheel if its a 4x4...smallest size tire for a 22.5= 36" tire. I too am looking into 19.5" wheels, but its looking like a very expensive venture. The cheaper Eagle Alloys are a polished aluminum, which will have to be re-polished often.
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Cowboy Cadillac 2007 Dodge 3500 DRW QC 4x4; 6-speed, RanchHands, 4" TBE w/ 6" Tip. AFE stage2, Silencer ring MIA