What brand and type of paper do you recommend for screen printing gig posters on?
Something that is acid free, and has some weight and substance to it.

I figure my gig posters will be in the 24 to 30 inch tall range.
I am using a large semi automatic press with a vacuum table.
The table has a printable area of 40 x 40. I don't plan on doing any gig posters that size, but maybe I can do some art prints that size some day.
What do you recommend?