#2 is the only decent gaming build imo, #3 is the only decent all-round build imo. With #2 you could def go with a better CPU (or if your primary goal is gaming, a better gfx card) and with #3 you would primarily need to improve the gfx card. Both lack ram (8GB is nearly a must-have nowadays) and #2 is based a newer, more capable chipset. Both could use at least a small SSD for the OS + primary programs.
Are you building these or are these offers?