Between those, I would go for the SVS towers, but by only a hair. The Aperions look quite a bit nicer, but I think their bass would be weaker, what with only two 4" drivers. However, in that price range, I would go for the EMPtek E55Ti towers over either one of those. It has the gorgeous looks of the Aperions and should perform as well as, if not better than the SVS, given its design.
Also I would skip both those subs and get either the Outlaw Audio LFM-1 Plus, Elemental Designs A3-300, or Hsu VTF2. I think any of those subs will have much better deep bass performance than the ones you are looking at, while costing nearly the same amount.
If you want to stay closer to your budget and still have good tower speakers, check out the Infinity Primus p362, and get a system based around those. VERY good towers for the price, if you look around you can get them for around 200 each. I'd love to hear a shootout between the Primus, the SVS, the Aperions, and the EMPs, I bet you the Primus speakers would hold their own even with with these more expensive speakers.