The snare drum is the most difficult to record because you get a lot of bleed from the hi-hat. When you place the mic, make sure the backside of the mic is facing the hi-hat. Make the drummer raise the hi-hat as high as possible and as far as possible from the snare, and use a baffle between the mic and the hi-hat. Buy one or build one yourself (see
Auralex Aural Xpander). Listen to the bleed very carefully when placing the microphone, not only from the hi-hat but also from the ride. Bleed will be your worst enemy in the mixing stage! You don't want those lo-fi cymbals in your mix!