We stock Kessils, I think those would be overkill depending on what your wanting to do coral wise. We actually had a 12x12x12 cube with the Fluval Nano LED and got good results with it. we ended up selling the whole setup. I personally dont like the look of the PAR 38s. I would suggest using the AI Prime, Fluval Nano/Halo, or the Kessil. In my opinion, I think the AI Prime has the most adjustability & functionality. I think its a great bang for your dollar.
Hopefully you can come by when I'm there and I explain everything in person instead of typing everything out. Or you can call the store and pick my brain too.
I was taking my finals yesterday. Hope I passed.