Specs on the Gigabyte Z87-HD3 look good, so it wouldn't be a bad option to the M/B you originally selected.

If you go the way of Nvidia, an SLI only capable motherboard is fine. The same applies with ATI and Crossfire. Having it capable of both usually  costs a bit more. But only if you plan to use more than one Graphics Card! If you only plan for a single GC, it doesn't matter if it's SLI or Crossfire capable. ;)