if you are planing on running only one graphics card then the nf4 ultra is the chipset you want . if you are planniong on runniong 2 nvidia graphics card the nf4 sli is the chipset you want. if you are planning on running 2 ati cards then a crossfire chipset is the one you want.
No point in the vanilla nF4 (no Ultra or SLI). These are the cheapest boards.
If you are NOT building a gaming machine, a board with the NVidia 6150 or Radeon Xpress integrated graphics chipset can make good sense.
A board that overclocks well is often a good choice for stock speeds since it tends to be stable and also will have especially good voltage regulation.
How will you use this new build?