OK, to adress what smoothdog and roxy are saying I am gonna go easy on the wavemaker pro I owned for over a year since it had sentimental value to me for the duration of the time I owned it LOL!
First off the wavemaker pro has very limitted options when it comes to wave making. When I connected 2 Koralia 4's in the first 2 slots of the wavemaker pro, the 2 pumps would alternate for 10 seconds each, shutting one off and running the other (you cannot change this time, it is preset on the unit). I hated this feature because this is not what happens in the ocean. The ocean moves as a whole body of water causing corals to stay up right and move side to side. They dont move for 10 seconds all the way to one side hitting the ground and then do the same to the other side. Not only is this stressfull to the corals but it is very unpleasing to look at. Then comes the option of switching the pumps to other slots on the wavemaker causing both pumps to run simultaniously and virtually blasting the living daylights out of my corals. This was another feature I hated especially for my goniopora and bubble coral. Both corals suffered because of this. Adding a wavemaker pro and 2 maxijets 1200 are going to offer you what I've just explained minus the rattleling noise when the K 4's shut on and off. If you are happy with this kind of flow in your tank than that is the way to go for you.
I, on the other hand wanted full control of the pumps. First, the fact that they both run simultaniously at minimum and maximum flows makes the corals remain upright and sway from side to side while being blasted with soft flow bouncing from all directions. Not onlly can you set the alternating times from 2 seconds to 6 hours, but you can also change the minimum and maximum speeds of each pump resulting in you obtaining the desired flow for your tank (wavemaker pro doing this, haa haa haa, not in a million years). This unit also has a synchronous effect which I havent really messed around with yet since I've only owned the unit for a week and the alternating effect is doing the job just fine.
Also, let me not forget to mention that each pump changes from minimum to max speed is .5 seconds, (wavemaker pro, LOL, definate no, no). I have not even begun to list all the details of this unit but all I can say is I am happy with it. I dont usually buy new products without others testing it incase it fails but when I saw the 2 year warranty on it, all I could say was send me the unit!