I will concur with what was mentioned above, I've been in a LOT of college stadiums, virtually all with bench seating, but Syracuse had by far the narrowest allotment of space per seat. It was crazy noticeable upon seeing it, and I've never seen anything similar since.
It's your program, but I'd take it down to the low 40s. 40k seats filled will be more impressive, and maybe lowder, than 42k in a 49k stadium.
Autzen Stadium, long renowned for being a crazy, loud and difficult place to play, holds 54k. I would definitely go for the Cameron Indoor analogy someone made earlier.
Of course, you do have to take basketball into consideration.
I personally think most stadiums will wish they were smaller 10 years from now. There's no way I'd be expanding my stadium like Louisville is. I'd much rather have a full stadium with a high ticket demand, than almost always have seats available. That dynamic of seats almost always available, like FSU deals with given it's stadium size and tiny population, takes a big bite out of revenue because they just can't demand the premiums.