Premium Luster, excellent Paper, RC based, will outgas. I love the look with color prints.
Epson Premium Glossy. Again a great overall paper, with the newer inksets gloss differential not as bad. Will outgas.
Epson Enhanced matte. You will be able to print with both inksets installed. This is a great starting point for a matte paper.
I would also consider the Epson Premier water resistant canvas. This particular canvas has a more aggressive look than others I have used, however once the ink in on it, it's very bomb proof. I still would coat it.
Paul C