A good compromise between price and quality, would be the exceptionally good sam adams light if it's the caloric intake you are watching by drinking that rocky mountain moose p - coors light. Like they say, it's the water alright, and take a look at the colorado river...no thanks.
to each his own however. Sorry, i've just got a thing against coors. And as a side note, the difference between light beers and regular beers tends to be nominal as far as calories go. Take a look at the label
Personally, I'd playy the I-am-the-birthday-boy card here and get your miller light, and splurge a bit and get something different. Hey it's your birthday. Go nuts.
Sam Adams Light
Fat Tire is worth every cent. Everything New Belgium Brewing makes is.
Amstel Light is not bad either
Rolling Rock Light in the keg is awesome(green bottles foul beer so kegged RR is good stuff)
Michelob Amber is tasty for an american beer.
In any case, I'd go with one light and one regular.
and btw...HAPPY BIRTHDAY!!!!
and double BTW... DW here HATES beer, be thankful yours will go near it at all.....