JustReefit, I don't think I have ever seen/heard anyone ask so many consecutive questions. I think you should earn an award.
450 watts for what size tank? anenomes, clams, sps, etc. take a lot of light. and you also have to think of what you want in there -- mushrooms are cool but they go everywhere unless you are careful. anenomes will, too, though in a different meaning to the word.
At least for me, when I sit down to think about a tank, I have to consider the whole scheme. Do I want sps/lps? Do I want clowns/anemones? How 'bout softies? It's all your preference, man. Some of the animals you listed require a skill aquarist and a rock-steady stable tank with good parameters, minimal change, and high flow. All of those equal lots of time, effort, and money.
I guess what I'm saying here is to first consider your tank size. Looking back over the post, I see that various tank sizes have been mentioned. First, start with that. Then think about $$$ -- lots of people use the 30-50 rule: You will spend $30-$50 per gallon on a reef tank to set it up right (over time, not neccesarily all at once).
Hope this helps a little (in the philosophical sense, cuz it isn't really helpful in answering some of your questions! :wink: )
John