Thanks a lot for the advice so far, I really appreciate it.
I tried recording a clean guitar and pitch shifting it an octave for bass, and on its own it sounds fine, but when brought into the mix it just has a big, boomy sound to it that isn't too distinct. Would eq'ing it help in that area, or is it something else entirely?
I actually had the apreggio riff doubled and in a stereo field in that mix, one guitar in each speaker, but they weren't totally hard panned (I think they're at 50%). Should I be doing that instead? I posted a new mix up where I did as you mentioned and doubled the power chords in the same way, and there is a definite difference already. The arpeggio riff is a little more distinct now that the chords aren't dead center, I think.
The thing with the guitar sounds all being different makes a lot of sense, but the issue with that is the sound I'm using is kind of the sound I want (at least, the sound I want before it's put to tape and becomes shitty for whatever reason), so I'm not sure how to keep the sound I'm looking for while using a different type of distortion on each guitar. Maybe this is just my complete lack of experience talking, though.
Also, considering I'm recording directly into my computer, basically, what would be the reason for it having such a weird, lo-fi sound to it? Is that a soundcard issue, or does that also relate to the mixing?
Thanks again!