I'd stick with the Antec. The TruePower is one of the most efficient units in that size, which translates to less heat, lower energy usage and longer life. OCZ is a decent budget manufacturer, but not considered one of higher quality.
There isn't much consensus on the best PSUs. The typical recommendation is to stick to Antec, Corsair, SeaSonic, PC Power & Cooling, and Silverstone for high quality. I tend to recommend OCZ occasionally to keep the cost down, but if you've got the extra $10-20 to get a unit from the manufacturers on that list, it's a very good upgrade.