Cheetah hands down...Just beware that after you fly it (and than the Tiger) that you're never going to want to fly a 172, or Warrior again.
PM me if you have any questions...I learned to fly in Grumman's, and instruct at a Grumman inclusive flight school.
Now that the AF seems to be using the T-6s I've been trying to drum up support for our flight school to can the cessnas and replace them with older surplus T-37s since you can probably get them on the cheap. I don't think the Chief is buying it thoughAnd a fine airplane the Tweet is! Great bird! As well as it's beefier cousin, the Dragonfly.
also, there are a lot (if there is a lot of anything right now) of entry level flying jobs in 172's, and they really dont care about cheetah time, however i would imagine it is a little more fun to fly later. yeah, depends on your goals...
flying for fun=cheetah
flying for ever= skyhizzawk