What ever tank size you decide with,...making sure you don't face some of the issues some of us faced,as I will tell you what I went through..
Years ago my smallest tank was 120glns sold the house decided no more tanks,...couple years down the road decided with a perfect spot in the house for a 40glns tank there it started...a year down itching and scratching my head,...hobby took over I could never go from a lrg tank to a smaller one,...and now reef business in process...
I am a full out junkie,...