Are these just as good as other air-cooled engines like Kawasaki, Honda, Kohler? In the past, we didn't think so, but now we're thinking twice. I just bought a 1979 Snapper mower with the original Briggs engine that still runs like new. Now I see mower companies are using the improved Vanguard & Intek Briggs engines........Bad Boy, Bush Hog, Exmark, Ferris, Grasshopper, Scag, etc. Any thoughts? Thanx.