I have been thinking on the same light setup, except with 4 A360x and one ATI Straton. That would give a great combo.That's awesome! Sand and wrasses are must for me too. I'll take what comes with sand any day, sure it can be a pain, but the sheer amount of micro fauna and bacteria that reside in the sand bed, far outweighs any cons. Have you thought about lighting? I'm actually thinking about using two Kessil 500x's and a couple panel-style lights over my tank, mounted really high, 2'?
The only thing I doubt about is the noise on the Kessis, People say you can hear the fan very well.
For the price of 2 A500x, you can get 4 A360x with an extra lens to cover the depth and spread.
Congratulations on the new tank.