Sam McKewon was on 1620 on Monday, and he commented that the front 4 NU had in the mid to late 90s were consistently among the best and most talented defenders in all of college football. They had guys who would play years in the NFL, who couldn't crack the starting lineup until they were late in their career. McKewon said that type of talent is so sought after and highly recruited now, it would be nearly impossible to replicate.
EDIT: I was partial to Donta Jones and Mike Rucker back in those days. Their length and athleticism was incredible to see.