Here's a list of great designers that come recommended by Distro Print.  

Eamo
Eamon Donnelly is an internationally acclaimed and award winning illustrator, designer, artist, photographer and Australian archivist and historian. - See more at: http://eamondonnelly.com/about/#sthash.YOdlZnbk.dpuf
http://eamondonnelly.com/

Jason Galea
Brilliant Melbourne based Multi-media artist.
http://www.jasongalea.com/

We Buy Your Kids
Webuyyourkids is Sonny Day & Biddy Maroney, from Sydney, Australia.
http://wbyk.com.au/

Alter
Rick Milovanovic from Melbourne Australia
http://www.alter.com.au/

Tbone & Aljax
Making some of the best rock posters around at the moment! based in US

http://www.tbonealjax.com/