We put Koni's on all four corners due to handling issues at 23,000 miles. The 2000, 40', Patriot had been sitting for two years. Upon our purchase we had the worst handling vehicle I had ever had the displeasure of driving. I thought we had made one expensive mistake. Went to a very reliable independent garage and he drove it, (Statkus Motors, Alb NM). Upon returning he suggested new shocks, specifically Koni's. He speculated the shock failure was due to the seals drying out from no use. Makes sense. He also indicated the Koni's were better due to a larger diameter and construction. I don't know, but the handling did improve along with sorting out air pressures and alignment.
Phil