The basic question is, how many PCIe lanes will you need, now and in the future?
If 16 for a single video card is enough, then the Z97 is enough.
But that precludes the use of a raid controller, a BM or AJA card, a second video card and the use of PCIe SSD's. If you consider using any of these in the future, then the Z97 is out and your only option is X99 or the older X79 with an i7-49xx CPU.
At this point it may be advisable to go with the Asus Deluxe X99 board at a minimum.....there just are too many improved features to ignore. PLUS, who knows how difficult newer codecs are going to be on editing machines.....some are engineered to use less bandwidth for internet streaming,BUT, are more highly compressed to preserve quality...possibly requiring more "horsepower" to edit ! it may be best to save a little more money up to go with a more robust machine...or, if in business....increase the LOAN amount !!
what about a x79 system, if it means i'd be able to afford more memory ?
...everything moves so fast now.....you buy something and its obsolete six months later !! That's why its hard to recommend going BACKWARD in technology when making a new purchase. X99 provides more high speed storage connections......more PCI gen 3 lanes......quad channel memory.....not to mention a possible EIGHT CORE Haswell E CPU !!! .....GO WEST YOUNG MAN !!
You would be better off with the X99 system than the X79 system even if the X79 has better specs if for no other reason than the upgradability available for the X99 at a lower cost later. I suggest the Asus Deluxe board as well and 32GB of ram. That should be the starting goal. Some of the other hardware can change to accommodate that.
Thanks to everyone for all the help.