I print on the HP Z3100. The 4 papers I use after trying several others are:
1) HP Premium ID Satin, which gives a nice dynamic range and is not too glossy.
2) Epson Premium Luster, for great dynamic range and color. Sometimes I love the surface, sometimes I don't.
3) HP Hahnemuhle Smooth Fine Art Paper. For a matte paper it gives good color, blacks as deep as could be expected, and the prints look great. I use the 310gsm weight.
4) HP Hahnemuhle Textured Fine Art Paper. While a textured surface is not for everyone, I love this paper. It has great color and the dynamic range is wide for a matte paper. My favorite textured paper had been the Bergger textured inkjet paper, PN33, but I could not find it in rolls. Now I like the HP Hahnemuhle TFAP, in the 310 gsm weight even more than the Bergger.