Hi!
Yeah that'd be awesome, and i even contacted PCS about this a few days ago, unfortunately they have no plans for the Vortex V Elite to get the gtx 980 option.
You'd have to get the Octane II Pro, which really is not that far behind a p870dm.
I guess you also want the p870dm instead of the p775dm because of the bigger cooling solution, but one of the employees of PCS told me that it only gets up to ~70 degrees under realistic gaming load, so no worries. you'll most likely be fine with the Octane II Pro