Sunpak PZ42X vs. Sigma 530 ST (non-Super)

[yiplong]

I am buying a flash for my Canon Rebel T1i. After some research, my choice has pretty much narrowed to these two units.
The two sells for about the same price: $131 for the Sigma @ Amazon vs. $140 for Sunpak @ B&H. Which one would you buy? Any experience with any of these two units?

 

[GooniesNeverSayDie11]

I own the sunpak, not familiar with the sigma, but the specs on the sunpak are great and I have been very happy with it.