TBS rock was fantastic. I did get TWO mantis shrimp. I hear KP doesn't have as many mantis shrimp.
Right now I have: sexy shrimp, Pederson's shrimp, gorgonians, a red macroalgae, some ricordea, mini-hermits, a snapping shrimp and miscellaneous snails and at least one small crab. For fish I have a Rusty Goby, three masked gobies and an out-of-place Flaming Prawn Goby.
My LFS (who also helped set up my tanks) sold the FP Goby to me as cost. I was actually asked to buy it at cost because there was no interest. I see why. I only see the FP Goby early in the morning and only about once a month. Sooooo not worth it.
The nano sits next to my desk so I can watch it when I'm working on the computer. Part of the reason I set it up was for that and partly so I could have a bunch of small shrimp and not have to worry about them being eaten or harassed my larger tank mates. I've really enjoyed it.