I have a 70g quadra by Marineland and love it. You will have serious space limitations for a sump. I use a 20L that I glued baffles into and had to buy a Remora protein skimmer to hang on the side. A regular skimmer would have taken up too much space. Check out the pics. One is of the tank and part of the stand and the other is the sump and all of the other crap you need with a reef tank.
Will