I have 2400G, I plug my monitor HDMI, and I plug VGA to the 50" TV, extended monitor and it works. With 16 GB RAM @2666 MHz I don't find problems, the motherboard works good with its native build in ports (A320M-S2H)
You can build the PC with a 2600 + GPU and it will goes good too, only check the model of GPU with DVI + HDMI ports 'cause there are old and new models , with or without the ports.