Little too much of a generalisation there, fella. Scots do use barrels from the bourbon makers, sure. They also use them from the French, Spanish and Italian wine makers. Amongst others. And, being Scots, they use them again and again. But the Scots used barrels long before Jack Daniels was a wee lad.
As for Jack being the best whiskey, well I'd point you towards Makers Mark, Bushmills, Jamesons, and all other purveyors of mundane whiskeys. But, if it's whisky we are talking about then have a taste of The Macallan. Oh, and check out the whiskies of Japan, or even more pertinent, the whiskies of Tasmania.
Jack Daniels is an average American mass market drop. Beats the hell out of Jim Beam, but then what doesn't?

