Yeah the 12 Fiesta or 03 Fiesta would def be #1 had we won IMO. Maybe even the Cotton against Arkansas too.
2012 yes, not the 2003
Anyway
1. Fiesta 97
2. Cotton 2000
3. Copper 93
4. Texas 16
4. Holiday 95
4. Holiday 2002
4. BWW 13
4. Holiday 99
The top three are indisputable and can be ranked however, the others are essentially the same to me, the 2002 Holiday Bowl was our best opponent of those five, Suggs was a complete monster and the best player we faced in any bowl game win or lose.
Suggs was definitely a beast, no doubt.
Others who were unblockable and deserve honorable mention were Mike Mamula of BC in the Aloha and Dwight Freeney of Syracuse in the Insight.com. Both of those guys changed the game much the same way Suggs did.
Offensively, Ray Rice at Rutgers and Drew Brees as a freshman at Purdue are the ones that come to mind first.