Here's my opinion of the beers you listed:
Miller Light -- Not bad for a light beer, but does take a little getting used to. Used to hate it with a passion, but now it's not so bad.
Bud Light -- Probably the best of all the light beers. Gotta' love Bud is you're a red-blooded American.
Bud Ice Light -- If you can afford Bud Light, there's no reason to get this. I don't even think I've ever seen Bud Ice Light, but Bud Ice isn't bad for a beer with the word "Ice" in it.
MGD Light -- Again, never had (or seen) MGD Lite, but MGD isn't so bad. Definitely a little better than regular Miller Lite, although probably the same cost. Just a matter of which you like.
Coors Light -- Incredibly overrated if you ask me. Tastes like crap, and the "silver bullet" is a pain in the ass.
Michelob Light -- Never had it.
Some other beers you might want to consider are Icehouse and Natural Bohemian, although they're not light. Good bang for the buck (especially the latter). But don't confuse Natural Bohemian (aka, Natty Bo) with Natural Light, which is disgusting. As a poor college student, I almost always end up with Busch Lite, which runs for about $13.99/30pak and is of tolerable quality. But if you're only going to drink 6, you might as well spring for the $6 for a 6-pack of Corona.
Oh yes, I forgot about Yuengling -- also a fine choice; up there with Corona.