I got the 4" BDS lift kit and I got the best price online from Liquid Offroad but the price with shipping was higher than if I ordered it through a local BDS dealer and paid tax. Liquid wanted $125 to ship IIRC. Dealer didn't charge shipping. I E-Mailed BDS and they gave me a list of local dealers.
I think that the HFS Springs have a better shackle angle out of the box. The BDS have to break in awhile. My shackles are vertical but I haven't put 10 miles on them yet.