I think you will find the Streams are less expensive than the other two options considering you need a large return pump, a drilled tank and plumbing. Besides that, I actually think you should use a Stream in combination with one of those systems to really optimize the flow and the randomness of current. If you use one of the others you could conceivably get just 2 6060's which you won't be able to run on a wavemaker or controller of any sort. Otherwise, you will need 2 6000's and a multicontroller. With the 6060's you can probably get them in a couple weeks, with the 6000's more likely 4-6 weeks.