If I have the time and patience, I'll order from PBR. It's most likely cheaper for a big order but searching Steve's site is a pain, at best.
I have a big order for Steve for my EBD restore, but it's a process.
If I want it quick and easy, which I normally do, I use Marco. I might pay a little more, but life is short. There really shouldn't be any surprises about the total cost. You see it all, before placing the order.