Originally posted by TheRooster
I'd be concerned with buying from a reputable company that will support its product, and if available, provide flowbench data on each injector they sell.
Good call, I didn't even address that part of the question.
The only manufacturers I explicitly trust when it comes to injectors are RC and Nippon Denso. Denso is, IMHO, better, but also much more expensive than RC. RC has gotten a lot better in recent years, though.
I've never even heard of Pico, and Bosch tends to be provide OE replacement parts, not performance parts. I'd stick with the big names on this one.