Hi Barry.
A few things jumped out at me.
Too much high mids overall making it a bit fatiguing.
The centre image is weak due to kick and snare too low and lacking depth.
The main guitars lack clarity. Probably due to the mix of 2 mics causing phase cancellation. I have never been able to get a mix of 2 mics to sound as good as one 57 in the right place. It also sounds like the same amp/mic/pre for left/right. I always use a different guitar, head and mic pre for each side. Usually a Mesa TR and Peavey 6505.a tube screamer REALLY helps too.
A neumann of any LDC is a no go for metal vox. AN SM7 or 57 or Audix i5 will sound much better and give the vocal more mid range attack.
If you have the wavs PM and come over and we can do a mix.
If you have guitar DIs all the better.
Metal is very different to "normal" recording. I can show you lots of tricks.
Here is a recent metal mix I did.
http://www.fileden.com/files/2007/8/...Track%2001.mp3
Michael