Maxi jets are typically a good option. Dr foster and smith are having a sale on them with a natural wavemaker. There are really just too many options available for us to just give you one. Tell us more about your budget for this. Really, you can get away with about $40 worth of powerheads or about $700 for vortech pumps or tunzes on multicontrollers. Your options are really limitless. I assume you want something in between but it's just such a large range.
In general, the more specific the question, the more specific the answer.
FB