If a Top 10 win on the road is less impressive than beating an unranked 4 loss Texas A&M (who also just lost to a bad Auburn team)-- I'm not sure how you are measuring the quality of teams/wins.
Even if you include your entire list it certainly qualifies as "one of the best wins in all of college football this year"
Half the teams ranked ahead of BYU don't even have a SINGLE top 25 win. So why discount it just because it happened early in the year? Better it happened than not at all right?
SMU is a top 10, #1 ACC team and BYU beat them on the road. They also won 11 games last year — they have averaged 40+ pts at home over two seasons. It's a great win.