Thanks for the comments guys. I may get harassed for the tangs, but I have a great LFS to unload them on when they get too big. I don't mind giving up fish. It just means I get to get new ones!
I really don't think I am going to add too much more LR. I like the way it is set up right now. My fish really do have a ton of fun in the caves...especially the Hippo.
I appreciate the kind words. I have worked pretty hard on this (and so has my bank account).