if i were you, and this is what i did, i set up a 29 gallon as my first tank just go i could get used to the whole sw deal because its a lot harder than fw the more you get into it but at first its pretty simple patience is key, anyways i got the 29 cycled had everything set up the way i liked it and then i added my first fish which i still wont let go of lol, golden damsel yellow tails, Sgt majors these guys got me into it and then i bought a few mushroom corals and learnt more on coral care then got some zoo's then some anemones then i got myself a clown and filled up my tank with more coral work once i got into the hang of adding supplements and keeping up with the extra work, i then upgraded to a nice 75 gal moved everything over, picked up a bronze copper tang and kept building up to a 120 with all the present stock plus a spotted snake eel hoped that helped a bit, take it easy nothing comes good when you cut corners in sw its all about taking your time and letting things work in their own pace