Breaking College Basketball into Tiers

Judging by the up and down results of so many teams in college basketball, I've decided to divide the top teams into tiers rather than attempt to rank them each week.  It would be very difficult and pretty pointless to put them in order, as the constant movement of so many teams would make it hard to notice any long term progress, and therefore not worth so much time for something so inexact.  I think this way provides a much clearer outlook of the the contending teams, and won't have the perpetual movement of a top 25 system.  Teams will occasionally climb onto the list and fall off, but hopefully it will stay fairly consistent for the most part, and it will give a good idea of my picks come tournament time.

Tier 1 (National Title Contenders)

Duke
Ohio St 
Kansas
Georgetown


Tier 2 (Could sneak out a Final Four)
UCONN
Texas
Pittsburgh
Villanova
Purdue
Kentucky
Notre Dame
Washington St
Missouri
Michigan St
Baylor
Kansas St
Tennessee
Illinois


Tier 3 (Good, but Final Four is a stretch)
BYU
Washington
Texas A&M
Temple
San Diego St
Memphis
Cincinnati
Michigan
Arizona
Georgia
Utah St
Wisconsin
UNC
Florida St
Florida


Tier 4 (Unheralded sleepers)
Wichita St
Boston College
Maryland
UNLV
Northwestern
Old Dominion
Arkansas
UCF
UAB
Cleveland St
Kent St
UCLA
St. Marys