two weeks ago, instead of just moving our 55gal tank, we decided to upgrade. the LFS was having a pretty good sale on black friday (75gal for $75 - we didnt need stand, lights, ect. but even if we did it was still $150), and we got sucked into it. anywhoo, after about 8 hours of work, we finally got everything together & happy.
now, with christmas around the corner, all we can think about is upgrading our lights. we were planning on doing it before, but good thing we didnt. here's the question: what kind, exactly, do we need? we dont really know what kind of corals we want to keep, but i dont want to upgrade more than once, or necessarily be limited in our choices of corals either. money isnt any issue ( this is the only thing we are getting for christmas, from entire family - everyone is chipping in ). i dont really need advice on brands, although that is always a help

, but more or less, the best combo of lights - compacts, MH, T5, ect.
also, i havent gotten a chance to update my info yet but the new tank is 75gal, long (48"), and we are planning on doing about 6 WPG, or a little higher.
thanks in advance!