Buying off internet?

Hey im looking into lights and have found a lot of packages online for a good price but was wondering if anyone knows of a good site they would reccomend thats trusted and has good prices.
The prices at the local shops are outrageous compared to what i've found online but im not sure if all the sites are legit.
Any advice appreciated.

growace.com

http://www.htgsupply.com/

alot of people seem to favor this site.

dont use Worms Way

thanks, i recently tried to checkout on htg and it all worked fine,
now a week later i tried to checkout and its coming up with an error upon checkout (wont let me type info or calcualte shipping)
ANY1 know whats up?