First of all congratulations on getting married.
I run a wedding entertainment company, and I think you would be better off using an ipod than take a risk on a DJ who charges less then $500.00 as they may end up ruining your night.
Three things that people most remember about weddings, the Bride's dress, the food, and the entertainment. So I always urge new brides and grooms to adjust their budget on those factors.
You want to look amazing, you want nice food and you want to have a good time.
You take a risk hiring a DJ for less than $500.00 for your wedding.
Hope that helps and hope you have a great wedding!