It is incredible, but comes in at something like $10,000+, however it sounds very very cool and you can get them fully customised, they even do 8 strings.
Listen to this for the sound,
http://www.uvainstruments.com/baphomet_sample_1.php
For interviews I would hit the bands forums as more often than not you will get responses from the bands, even bigger named Australian artists such as The Berzerker tend to respond to messages over myspace.
If you want a entertainment company that are in touch with most of the artists, I...
Personally I cant growl all that low, I am not a great singer but my singing voice is quite high and I think that has something to do with it.
The vocals on Mournful Congregation's The Monad of Creation are extremely low and slow as are most growls in Funeral doom.
Cant recommend you starter packs but I definetely second Nissan on Pain of Salvation. Opeth are also a great recommendation and if you like power metal perhaps try Symphony X or Ayreon as a couple of progressive bands that lend themselves to that audiance.
Pestilence - Spheres
Sigh - Imaginary Sonicscape
Cynic - Focus
Less the second, but all of those are extreme metal with a very strong focus on the jazz elements. As for accoustic grindcore it could be quite difficult given the fact it is hard to distinguish a lot of notes from accoustic...
Nothing tops the climax to As Icicles Fall by Ne Obliviscaris except possibly one of the two other songs from Ne Obliviscaris's EP The Aurora Veil, you may need to wait 10 minutes for it given most of the songs go for 12 minutes but it is well worth it.
Fear Factory - Soul of a new machine
A lot of short, fast, industrial death metal songs. It has grind running through it a bit but I would not call it anything like Napalm death by a long shot.
Sunn are quite good, their recent Australian tour with Attilla from Mayhem was incredible, however a band I prefer musicially, though Sunn put on a better spectacle is KTL. Its very extreme, computer orientated with black metal running right through it but I would still hazard to call it drone.