have a look at my albums,new tank setup,It should give you an idea.Also put your skimmer in the first section,live sand and chaetomorpha in the second and heaters and return pump in the last.Are you going to be using an overflow box if so make sure you leave enough room for excess water from your dislay tank if you have a power cut,i reccommend the eshopps overflow.
If you use any macro algae you wil need a small light,13w or so.I use a UV reptile screw in florescent on mine.you will be amazed with the transformation of your water quality and algae problems within 2 months