As Doug1 mentioned reshearch is the key.
Since you have a 65gal and a 37gal sump/fuge you will have to decide on a skimmer, we can only throw out ideas. Since your tank is less than 100gals, a HOB might work or even a skimmer rated up to 150gals would work as well. It comes down to $$ and how much you want to spend.
The 37gal
sump you can baffle off and have a skimmer area, the main drain for the display, then some baffles a fuge area then the return area. Here's a good site to get more
info on sumps/fuges.
But this all goes back as to what type of tank you will keep; FOWLR, mixed reef (softies/SPS/LPS), SPS only or ... Zoos and Ricordia's. After you make up your mind on the type of tank, then we can help you better with advise.
good luck