need advice: next tank size

[etoja]

Hey guys I am fairly new to this forum and wanted to ask for some advice.. I currently have 20 gal saltwater tank with small clownfish and shrimps, some live rock and few mushroom corals. I have had it for over a year and feel like I am ready to move to larger tank and possibly attempt to keep more complex corals. Which tank size would you recommend? 36 or 55g? Should I try to set current tank as a sump? would 36g + 20g sump be a good setup?
Thanks ahead for your advice!

 

[kjboer7]

I would say the biggest you can fit and afford the more water you have the easier it will be.