After A&M winning in Columbia last night I don't think you can put the Tigers in the upper tier debate DSM.
Just my breakdown of the teams by "class"
Top tier
1. KU
2. Texas
3. K-State
4. Baylor
(I think 2-4 can be ordered just about any which way on any given night)
5. A&M
6. O-state
7. Mizzou
(these three can go anyway as well)
8. Texas Tech
9. OU
10. Colorado
11. Iowa St
12. Nebraska
I think 8-10 is a slight step above 11 and 12 but I am not sure if it is much.