I don't see any issue with the G3258. I love that its cheap and if I outgrow it in a year or two... then my motherboard will support said upgrade. I went with a Zalman Copper heatsink/fan that has good ratings when used in an OC environment... Only thing I forgot was a couple of 120mm fans, but the case comes with 2 stock (with room for 2 more)...
My only concern now is the R9 280 and the 500W PSU.
My only concern now is the R9 280 and the 500W PSU.