How wide is the graphics card you want to buy? If it is a double width card then you'll probably find that most of the other slots are covered by the graphics cards.

The Foxconn you linked to will only have that 1 PCI slot accessible if you fit 3 double width graphics cards into the PCIe slots. The left most graphics card will also be sitting right on top of the various USB and other headers as well which will mean a tight fit.

Intel are releasing another series of processors in the Core i range soon which should be cheaper than the current i7s.