Yes, it is frustrating trying to make the rock look good and still have good flow and everything. I might see about getting a couple of really big pieces of live rock instead of some of the small pieces I have. I got the smaller rock because the tank I started out with was a 29 gallon tank... Now I have the 90 and it is very deep.
I love my ro/di unit from BRS!!! It makes things so much more easier! No more going to the LFS for water. I use the ro/di water in my freshwater tank as well. It's a time saver!
I like the low scape a lot! The only thing that worries me is that big white rock and the rock directly beneath it look like they could both topple and hit the front glass. Obviously I can't see how they are anchored but that big rock looks like it could do some damage.