A couple of things. If you are going to be doing a SW
reef you will need to get rid of the glass cover. You will need the O2
gas exchange that is provided by an open top. Most of the time lighting for a reef is pretty intense, even for the lower light corals, that is the reason that many of those fixtures you are looking at have legs, they have to be off the surface of the water.
The NOVA extreme will work well for you but you will need to have it on it's legs, if you are wanting to suspend something over the tank then the TEK Light will work better for you. Either way these are good choices. If you want to get into more custom stuff you will need to look at some retrofit kits.