I would go that same route except i'd lose the actinic and just rock 2 purple plus bulbs. That's just my opinion though. I've also seen some very nice looking displays with just a 50/50 mix of ATI Blue + and the ATI aquablue specials. It just depends on the look you're going for I suppose. Post some pics of the setup once you get your bulb arrangement down.
When I went to Reef Solutions in Warren they had ati bulbs over their displays, the lady that was there was able to turn on different bulb configurations. I would recommend trying that to see different types of combinations.