If I had that big of tank, I'd be tempted to, too. Bigger tanks give you more flexibility. All my tanks are 4' and under and all have only 2 or 3 species max, most have one. I just hate the concept. It seems created by stores to sell fish. Lets take anything that can live in pH 6-8, call it a community fish and tell people to keep them together at 7.0. Everyone's first tank is one of these and it creates more problems on top of the usual "cycling" issues. So you get people killing fish and dropping out of the hobby because their first tank didn't work.