help with new reeef tank

hello, i'm setting up a 65 gallon reef with a 30 gallon sump. I need help with a decision that I cant make. its about a deep sand bed and a fuge. should I have a deep sand bed in my display or a dsb in my fuge? or both? or ssb in both? i'm not very interested in bare bottom tanks so that's out. I do like the look of dsb but idk if there's any point in having one if I have a dsb in my fuge. or maybe I can have a dsb in my display and not have a fuge idk? I plan on keeping mostly sps and lps corals