I have the 170. I used CaribSea Life Rock and their Natural Reef live sand. I think the Sicce 2.0 is what I am running as well. Tank is 4 years old and I am still happy with it. I think the xr15pro can cover the tank, but you may be lacking in light at the bottom corners. I run a Hydra 26HD and 4 T5 bulbs. I average around 250 PAR throughout the tank.
IslandLifeReef,thanks for the info.Was also thinking of going with the real reef rock,I guess 30lbs would be ok.I like the ecotech marine,might have to upgrade to the xr30for more coverage.