The Antec is much better. IIRC the Neo Power is a Seasonic with decent quality and the +12v combined output should be around 30A or so and with good efficiency. It should be more than sufficient for the specs you listed. The Ultra V-Series is a low budget model made by Wintech, IIRC. It is a lesser build quality than the Neo Power, and an older design with lower +12v output than more modern 500W PSUs plus efficiency is lower. HOWEVER, if you were running an older rig that used more 3.3v and 5v and less +12v, then the V-Series may actually be a better match. BUT, you're not, so go with the Antec.