Hey Roger,
Just got done reading your post and I am stoked about everything ya said because I KNOW you will do well!! It's only a few things you need to keep in mind and you will nail this genre.
The Metallica thing... no, not really like after the chorus. A better example would be the opening to "The Four Horsemen" .. then at 0:58 .. sing this in your head along with the guitar riff... chunka chunka junka junka chunka chunka junka junka... hahaha.. THAT's what I mean.

Then at 2:04 the next part is a cool rhythm guitar solo jam that breaks into an awesome bang your head section starting at 2:13. Notice the dynamic feel that is created from dropping everything out and then coming back in. Less IS often more... not always, but often enough that the saying carries plenty of weight to it.
Now that is a bit OLD for this listing BUT the tricks are still basically the same.. just done in different ways with newer sounds, tones, mixes, tunings, etc...
Let me point you to Slipknot - Duality at 0:32 into the song.. it's NOT a chug like I meant really, but it's a stop start. Well defined chunk chunk sort of stuff. Then at 0:55... under the verse... that is one cool riff. The sly sounding vocal is cool too and simple as heck.
Now, I know they weren't listed but I feel like I NEED to point you to System of a Down - "Aerials"
http://www.youtube.com/watch?v=L-iepu3EtyE&ob=av3e This song is AWESOME and shows a modern metal sound that is almost a POP Metal if there is such a thing. Shows it extremely well imho. Drop C tuning... it's awesome!! This is in reflection to a sonic quality to aim for, but it's almost impossible to get in our home studios... but why not aim for it anyway is my opinion haha.
Guitar, you need to put your guitar into a drop D at least. Drop C sharp or even drop C. Aerials is in drop C. In these low tunings you will find that the edge of the guitar is no longer around 3k but more like 1-2k.
Bass, comp or limit the bass fairly heavy BUT use a high pass on the sidechain input, if ya have a comp that has one, so the low end of the bass can pass through and barely comp it. Then try with a second comp.. preferably a limiter to keep the lows in check. This will give a snapping bass but allow the lows to keep the mix solid. (I recently started doing that and I am liking the results) Bass guitar USED to be the red headed step child in my studio too. Now, there are plenty of mixes where the bass guitar is really buried in the mix and that is fine, BUT it's still audible when ya try to listen for it. OR the bass is blurred with the bottom of the guitars creating one big unified sound.
Drums, keep em as dry as need be BUT no need to keep them ugly dry unless you have the guitars and bass extremely dominant. Balance as best ya can.
Now.. everything I am saying about your mix IS me being VERY nit picky. Just trying to help you produce a better stereo master if I can. Like I said, what ya did is quite good, I can tell you have talent.

Honestly... the worst thing about your song, imho, is the obvious lack of effort to put out an actual song. And I am saying that as a die hard metal fan. I do despise Slayer, Pantera, etc... though. I can't stand their persona to the point I won't even listen. I use to LOVE Metal Church though. Mainly for the music... Gods of Wrath got me into them.
Take care Roger and I look forward to discussing many aspects of music in the future!!!
John
OH, and if you find a better way of doing things... feel free to pass it along to me too LOL. I will always happily share any info I have learned because... IF you and I are up for the same spot... I would prefer to lose because they preferred your song... Just so long as one of us Taxi members gets the deal... I'm good with that.

Eventually I will have the song they want, it's only a matter of time and effort.