As opposed to DGF, I think that that light will do you just fine. Most HID systems come like that with the ballast, reflector, bulbs, and some misc things in one package. When I talk about complete systems, I am talking about the ones that run about a thousand or more and include everything--things like a tent (that might not be the right size), a fan (that may just be a duct booster fan and not a real exhaust fan), nutes you may not want, etc. This looks like a well priced HPS that will provide you with what you will need. However, you are going to need an exhaust fan. Something like this:
http://www.amazon.com/dp/B005KMPN0K/?tag=skimlinks_replacement-20
I find that I get far better prices from Amazon than I can get from the hydro store that is about 60 miles away. In fact, I don't frequent it as we are in an illegal state and it just seems too easy for the cops to watch it. And if you have Prime, you can get a whole lot of stuff in 2 days--one day shipping is only a few bucks more if it is an emergency. In addition, a lot of grow store people do not grow and do not know sh*t (that is not a swear word if you are a plumber). They sell what they are told to sell, usually depending on what some slick manufacturer's rep can talk them into. Not a big fan of grow stores and their employees....
Glad to hear that you will also be getting some more seeds started. I see no reason to drive 30 hours for anything. You can get pretty much everything you need online.