The B1G West isn't stacked, but I think it'd be harder to maintain and consistently recruit at Purdue than it will be for him at Louisville. It's easier to set up pipelines when you're recruiting to Louisville and playing in the ACC. The midwest, atlantic coast, and southeast are all available for recruiting. Purdue has to strike gold with under-the-radar kids from Indiana, OH, KY and occasionally IL.
He did well in his first two years, obviously, but you can't count on a Rondale Moore coming to Purdue every year, or even a Milton Wright. At Louisville, he's getting those guys yearly.
There are less obstacles in the ACC, although the one current obstacle is a BIG obstacle, but I think Louisville in the ACC is more sustainable than recruiting to West Lafayette, even with Clemson looming over everything.