I have a Bowen Esprit II 500 kit which suits my needs very well. Two heads, two stands, umbrella and softbox, would highly recommend looking at it.

Something like this from Adorama would probably be close to your budget but there are many others in there to look at as well.

http://www.adorama.com/POSMAKC55K.html

I have found Amvona costly with their postage.