Thanks for the suggestions... I guess that I'm looking for something that is performing similar to the Locosys model you mentioned.
So, I realize that maybe I should "restate" my question to "which GPS receivers exist that have a relatively fast satellite acquisition?
Has anyone used the Ublox Neo-6M? It looks like it has an external antenna adaptor, and also a coin battery attached to it. I wonder what the sat acquisition time is for this model...