Also check out pro flow dynamics. I use the aluminum cam locks for 1/2 to 1/3 the cost of stainless. Just add a silicone gasket to the female camlocks. This site also has good prices on the stainless NPT fittings and reasonable shipping.
I can vouch for both bargainfittings and Bobby_m as I've ordered from both. Bargainfittings came up cheaper though with the $5 flat rate shipping IIRC.
Tell me about it. Bargainfittings just got about $200 more from me two days ago for my system build, that's on top of the $300+ that I already spent there.
Stainless stuff is expensive! But hopefully I'll be done for a while after the last purchase.