Keystone Light is made by the Coors Brewing Company and has only 104 calories and 5g carbs. It's relatively inexpensive and has a smooth, non-bitter flavor.
My boyfriend says the taste is a 'typical American beer', a nice amount of flavor here. It doesn't taste watery.
At 5g of carbs, it's quite a savings over regular beer, and the flavor makes a good balance. I'd definitely recommend this people as one to try and see how you enjoy the flavor!
Low Carb Beer Comparison Chart