Cincinnati, Memphis, UCF, Boise St., and BYU (to make a 14-team conference) they would have the following teams in basketball (Pomeroy rankings from last season):

#2 Baylor
#5 Houston
#17 Texas Tech
#20 BYU
#23 West Virginia
#27 Kansas
#31 Memphis
#33 Oklahoma St.
#61 Boise St.
#100 UCF
#116 Cincinnati
#140 TCU
#147 Kansas St.
#171 Iowa St.

That would be a top-tier basketball conference. In football, it wouldn't be as high but still relatively solid (using the upcoming season's FPI projections:

#9 Iowa St.
#16 TCU
#19 Oklahoma St.
#22 Cincinnati
#34 UCF
#35 West Virginia
#38 BYU
#39 Texas Tech
#42 Baylor
#53 Memphis
#63 Houston
#67 Kansas St.
#71 Boise St.
#119 Kansas