A build can be made if you really need it at a lower price but you said $1000 and this is the best you're gonna get with that, cant really replace any components for a cheaper price unless you want to sacrifice performance
Kind of a tricky spot. I could suggest a high end video card and an adequate power supply to go along with it but the a10-5800k processor will most definitely bottleneck it. Are you down to build another computer and use the ram from your old computer in it?
Just $3 over and this beast has an i7 4790 and a GTX 970 which will play any game you throw at it highest settings 1080p. Im assuming you weren't planning on overclocking ( which isn't a problem) so thats why I chose the i7 4790 instead of the 4790k. Benchmarks : https://www.youtube.com/results?search_query=i7+4790+gtx+970
If your existing case is atx-mid tower , has good airflow and cable management options, a few fans in it, and you feel comfortable using it, then yeah. But if its from a prebuilt dell or hp desktop, wouldnt recommend.
A build can be made if you really need it at a lower price but you said $1000 and this is the best you're gonna get with that, cant really replace any components for a cheaper price unless you want to sacrifice performance