Hi Denise,
The best piece of advice anyone can offer at this stage of the game, is do not be in a hurry. Only bad things happen fast in a reef.
I predict great happiness for you with your new tank. 150 gallons is a most excellent size to build a reef in

Next piece of advice, is don't take any one person's word as the law. There are many different ways to go about this, and still do it "right"
Listen to all suggestions, decide which ones make more sense, and then research to make sure it makes sense for a reason.
I was once a big advocate of the DSB. The argument coming from the BB crew made me rethink that. That's why I now say "don't put all your eggs in one basket" I. as well as all the other well meaning members here will do my best to give you only good advice. That doesn't mean I'll always be right, or even have an answer to offer. Take it all in, decide who makes sense, and double check what they tell you

I have currently in my 220, about a 1" sand bed. It's only there for looks, and to make my bottom dwelling critters happy. I don't depend on it for filtration at all. I do keep a DSB in my refugium, which is something worth looking into.
While I am happy with my Lifereef skimmer, there are some really interesting models and designs.
This guy builds (by hand) some of the best quality skimmers/reactors I have ever seen. I'll be ordering a Ca. reactor from him in the near future. I know Geo well, and feel very comfortable recommending him. There are lots of other guys also building this equipment, by hand. Many of them are also building very high quality stuff.
Lights are even harder to advise you on, as what you want to keep, and what pleases your eye are the criteria. I can easily recommend a skimmer builder, because he'll ask you what you want to keep, and design a skimmer to meet your needs. I can't decide what looks good to you, so all I can really say on this matter, is that you need to make some big decisions. Will it be a full reef? Are you interested in leathers and Kenya tree, or Acros and clams? Once you are sure of the answers to those questions, I have a few more for you
