My advice is to get quality components that you can then expand upon later on down the road, NOT get everything for cheap and then upgrade everything later on.
I've been satisfied with my Alien Bees (2 B800s, one B1600). I'd suggest grabbing two B800's, a large softbox (or two if you can swing it, otherwise a shoot-through/reversible umbrella), a set of honeycomb grids, and of course the necessary stands.
AVOID CHEAP LIGHTS!!! With cheap lights (
eBay, etc) you'll most likely encounter inconsistent and weak light output and inconsistent color temperatures. Along with of course the poor build quality that comes from relatively cheap items
As for the background kit, I've been using a PhotoFlex backdrop stand kit, and besides the bag saying "My First Photo Kit" (or something ridiculous like that) I have no issues with it. It is sturdy and has fit my needs. Now, what color/type of backdrop to hang from that depends on your needs. You can get paper rolls for fairly cheap (meaning different colors as needed).
All in all, for what is listed above, I think you're looking at about $1000.
However, in the name of honesty, I must tell you that I have had one of my B800's crap out after about 8 months of light use. However, they have a pretty good warranty (2 years) and it is currently in for repair.