Damn Patrick, that BK is sweet, what model is it?
How tall is the stand, you may have to cut the bottom of it out to accommodate the height of a good skimmer, I don't know. That is one of the major problems with running everything in the stand, plus there may be a big noise issue too, especially is this in a quiet part of your home. There is a lot of planning involved, get it right the first time. I would go with 250wt or even 400wt Halides(3 of them) with good reflectors, like Darin said, you may be able to get away with just 2 bulbs, depends on how well the reflectors spread the light out. I personally would look into either a T-5 kit for some actinic light, helps make your corals pop. I have found the best light for this is VHO, but T5's do a pretty good job, plus I am just running bulbs from TFP, no ATI bulbs yet, they may do better when I give them a try.
Are you looking at external pump or internal for the return? As far as movement in the tank, Vortechs or Tunze are the only ones I'll put money down for anymore, I haven't tried those Polario pumps, so I can't vouch for them. I have modified maxijet's too, but the sometimes can look kind of funky. If you want to keep "stix"(Acroproa, and other SPS), then I would be looking at no less than 50X's tank volume for flow inside the tank(not through the sump), and upwards of 100X's is even better, IMO. In a 215, that would equate to something like 20,000GPH, you may not need quite that much, but I would figure at least 15,000GPH(again really the more the better with Acros, IMO, so that would be like 5 or 6 Vortechs, or high volume Tunze streams on a controller/s. It is going to be expensive, it would be like $2700 for 6 Vortechs, I'm sure the controllable Tunze's would be right around the same, unless you could find a deal on some used ones. I am sure I have more to ramble on about, but got to go take son to little league practice. Have a good one.
Matt