The personal message from Scott really convinced me. Everyone has to start somewhere and if he wins, at least this time around he will be jumping into the project with a little more experience under his belt! Good luck all for the lucky giveaway!
Scott's got my vote. Even CS:GO would be pretty tough to run on the 7790 even if the memory's there for it, especially at any competitive level. An R5 and 1050 would be a serious upgrade there.
If Scott does win, I'd suggest he go for something other than the Gaming Pro B350, in case he wants to upgrade in the future.