I think it depends on what else you have in the cupboard. If Georgia State or some other extremely low tier program were to suddenly get the best class in history, I think they'd still have a hard time pulling in wins versus an average SEC team.
For Tennessee, if this class holds where it is now and the class actually performs close to what it is on paper, I think it alone could take us to 7-8 wins the next two years and 8-9 wins the following two years.
If we could add another solid top 10 class in 2015 with, then I think you add another 1-2 wins a year.... and so on.
TLDR: I think it'd take 3 great classes in a row to have a true shot in the SECCG, maybe 2 in a weak year for the SEC.