Although I might get ME3 first for the multiplayer. Currently playing the Demo.
I am impressed with the graphics
Being the third iteration of the series, it\'s definitely the one that has the best graphics of the bunch. That is not to say the other two look awful but if you can overlook the graphical differences in quality, you will definitely enjoy the story and the continuum of it that extends through the 3 games.
Between the 3 games, the story in ME1 still ranks the highest for me. It\'s a personal preference so take it for what it is, a mere opinion of one gamer who has finished each game (including the major DLCs for each game) numerous times. How numerous? A rough estimate would be about 10-15 times.