If doing severums, it would be cool to do some green, some gold, and maybe even a rockteil from TUIC! One wouldn't be that expensive. Not the way I'd go with a tank that size (I'd get greedy and want a big community tank, Texas, RD, JD's, GT, trimac...a crazy mix if it would work)...or just a pair of dovii or umbees, but several sev's and O's would be a sweet tank as well. If you have not seen pics of the Rokteil (sp?) on Jeff Rapps site, you should check them out!