Stocking My 50 Gallon - Advice Needed

Hello All This is my list that I want to put in my 50 Gallon:

2 Percula Clownfish
2 Banggai Cardinal Fish
1 Blue (Hippo) Tang
1 Goby or Blenny (Any Suggestions?)
1 Purple Firefish
1 Royal Gramma

1 Clam (Any Suggestions?)
2 Skunk Cleaner Shrimp

What I have in there right now:
1 Brittle Star Fish
7 Snails (turbos and other smaller ones that I have yet to ID)
2 Peppermint Shrimp
5 Little Blue Legged Hermit Crabs

Please keep in mind that I intend this to be a reef system with many different types of coral as well. Any Suggestions, comments or tips would be appreciated! Thanks.

You can check out my tank info here:

http://www.3reef.com/forums/say-hello/hello-new-50-gal-53943.html

 

As for the goby/blenny, I would go with a dragonet(green madarin, the one with stripes) down the road.

People might say tank is too small for a blue hippo...

 

Oh, yeah.....the tank is definitely too small for a hippo. They get to 12". Tangs shouldn't go in a tank less than 90g IMHO anyway. I pushed the outer envelope with a 75g before I upgraded.