I have the rw-8 in my 60 gallon and it's too much. I have it at its lowest settings and it causes me to really place corals properly. I will be going down to the rw-4's when I get a chance. But I'm also considering the maxspect gyre 130. Different price range I know, but it's very interesting in the number of methods you can place it. Something you may want to look into as well if pricing is not an issue. But if I look at the number of flow pumps I have bought, it would be more than the cost of one Gyre. Food for thought, but the rw-4 will be plenty for your tank.
I hesitate to mention it, but I suggest maybe slowing your return pump flow too. You've got just over 18 times turn over rate. Depending on the type of sump you have set up, slower flow will yield better results for your sump activities. Let you in tank pumps do the flow work and let your sump do it's sump work.