For decent metal recordings, some of that money should be going towards getting a good metal guitar sound. The options here are a plenty but basically involves a decent guitar and a decent amp or amp modeller (even better still, get both: a tube amp and perhaps a johnson j station or something from line6 or digitech)..
You may also want to think of a good mic (an SM58 is a wise investment: its an ok vocal mic, but unscrew the ball cap and you essentially have an SM57, which is a great basic guitar mic), which will facilitate the need for a mic preamp. The mic preamp isn't just needed for microphones. You can plug your bass guitar directly into it with the output going into the pc, providing a decent bass sound (or, if you want a better tone, you can drop a bass amp modeller in between the bass and the preamp as well)..
I know you specifically stated you were looking for the right stuff to record to pc, but all you need to basically accomplish that is a pc, soundcard, mic and a mic preamp.. for metal music, particularly guitar, you will need decent gear to get a decent sound before you even click on the record button.
Input is where you would plug the preamp. If you plan on recording all the tracks in the pc and burning it to CD, you will only need to worry about one output which should go to your pc speakers (or better yet, your studio monitors, hooked up to either a stereo receiver or a dedicated amp. In fact if you don't have studio monitors I would SERIOUSLY consider purchasing a pair before you start recording).
Cy