[dpoltsdsu]

I wouldn't recommend having 2 species of clownfish in the same tank, they will likely fight. The mandarin should be added later due to its specific dietary requirements. Does the 4 number indicate 4 yellow tangs? Other than that it looks good! Take a look at some of the reef octopus skimmers, I hear a lot of good things about them.

 

[dpoltsdsu]

No problem, 4 yellow tangs may be pretty unnecessary in my opinion as well. That is a high bio-load fish and having 4 will put a lot of strain on a 180 with all the other fish going in as well. The 4 clowns would more than likely fight. You should stick with a pair. The other fish and inverts look good to me. A fish list like this that is based on your list would work well.
Pair of clowns
The 3 of pairs clown gobies (yellow, black, green) The black and green will be tough to find in a 180 though!
Firefish
Zebra Barred Dartfish
1 Yellow Tang
Hippo Tang
Maybe another species of tang like a Kole or a sailfin
The shrimp/goby pairs
Lawnmower Blenny
Neon Gobies
A group of Chromis

That would be an alright bio-load and provide lots of color and interesting behavior. Also, if you are getting a bubble tip anemone there is no guarantee that the occ. clowns will be hosted. A pair of Clarkii clowns are naturally hosted by bubble tips and much more likely to develop a symbiotic relationship with the anemone. They do get bigger than the occs but they'd be fine in a 180. Just my 2 cents.

 

[dpoltsdsu]

Acroporas would probably be the last choice I would recommend as a coral. They are difficult to care for and need perfect water and parameters. Like reefzilla mentioned, a variety of lps and soft corals would work well. Look into species of Euphyllia like Torch, Frogspawn, and hammer. They are beautiful and can get pretty big with the right care. They are also generally hardy. Other lps to look into would be the duncan and some of the open brain corals. Both of those species are generally hardy as well. A big toadstool leather would look great in the tank as well.

And no problem, glad I can help.

 

[dpoltsdsu]

No problem! Good luck!