oh yeah, btw, I'm recording a metal band. They want a killer kick drum sound. Also, maybe should i mic the top and bottom of the snare w/ my 2 sm57's? then beta 52 on kick drum and condenser OH?
Metal drums with 4 mics (and not an ideal pair of overheads)? You're going to have a fairly hard time getting that right. I think even the most experienced of engineer would struggle to get what people consider to be 'killer metal drums' from that kind of mic setup.
You see... normally when mic'ing a kit, you want to try and capture a pretty good image of the whole kit with a pair of stereo overheads, then everything else (spot mics, room mics, etc) are for reinforcement or embellishment. For this, an overhead + kick + snare setup is very common and works well for a huge variety genres and drum sounds.
However mic'ing up a kit for a stereotypical metal drum sound on turns this on its head - most of the drums are captured by close mics and then the overheads become more like 'cymbal mics'. This allows for the greatest separation between drums, more processing to be done on each individual piece of the kit, and an overall less realistic, more metal sound! That doesn't mean to say that they have to be recorded in this way - I'm sure there are some very talented people who can get a great drum sound from a stereo pair of condensers (as a result of a really good kit and drummer), however we have to be more realistic here on a forum about home recording!
In fact, lots of drums parts for metal songs are done with samples or triggers (a popular thing to do is to trigger or blend samples for all the drums but keep the real cymbals) - even then you still need mics or triggers on each individual drum. Electric trigger pads / V-drums? Heck, you could even go the whole way and do it all in MIDI - most of the people listening to the song would probably never know. A lot of commercially produced metal songs use programmed drums.
That is; unless the drummer is insanely good at playing his kit with the right balance required for them to mix well - i.e. thwack the drums and go light on the cymbals. Unfortunately your average-joe-drummer-in-an-amateur-metal-band (sorry any drummers amongst us!) loves to have the largest. loudest crash cymbals available to buy, and also loves to keep hitting them really loudly throughout a song, drowning out everything else.
So if you really have to stick with the 4 mic setup, the two things that will probably affect the outcome of the recording more than minor details in mic positioning are probably...
- High quality and well tuned drums / cymbals that are suited to the sound you are after
...and most importantly...