Well our fan base might not consider Xavier and Creighton rivals since we've only been back 2 years and have lost to them a significant number of times but I'm damn sure I'd rather go see us play them then BYU, K state, ok state, Colorado, Texas tech, etc. Couldn't careless about those schools. Your argument for if there would be any juice against playing Xavier and Creighton would also apply to the big 12 schools. Creighton and Xavier were sellouts last year, I'm sure they'll sell out again this year. Unless any of those big 12 schools were in the top 15 next year outside of Kansas, I'm not sure I'd care, just because of their name.
I personally believe that a game against Ok St, K St, Baylor or Iowa St as a conference home game for us would have every bit as much juice as the current matchups with Creighton and Xavier.
I'm sick of hearing about the alleged history when the only history is with five of our ten (exactly half) conference opponents and at the moment only Nova (due to their Jay Wright success), PC (due to location, a douchy fan base and Cooley success) and St John's (due to a coach who has yet to coach one fame for them) carry any real juice.
We've played WVU and Cincinnati more often than we've played DePaul or Marquette and we've played UCF and Houston more than we've played Butler, Creighton and Xavier.
There are bigger names and better brands in the B-12 than there are in the BE and taking us out of the equation, in the short term (10 years)they have as many national titles as the BE and stretching that another half dozen years they have more.
If our fan base needs PC, Seton Hall, DePaul, Butler et al to get worked up
and won't get worked up against Baylor, Houston, Kansas St or BYU we need to take a long look at what our fan base really is.