These guys only do 180 gsm for $38.
http://www.printroom.com.au/large-fo...ers-quoted.php
LOL just had a look at their order form, they only allow 1MB file to be uploaded, but specify it must be 300dpi. I'd like to see the quality of that jpeg.
My full-res jpeg at 300dpi is about 40 mb. The full-res TIF is 100mb.