There really are a ton of options at that price point. I got my New CZ75b with Omega trigger for $429 out the door. There are lots of police trade-in guns around, Glocks, Berettas, S&W's, P6's, etc. You can also find some of the 'less-desireable' HiPower clones for that price.
I do have to say, there aren't many guns I dislike. Usually if it goes bang and puts lead in the general area I'm aiming, I like it. But the Sigma's have such a terrible trigger I couldn't possibly advise somebody to buy one ...