RE: which one do I pick
I'd suggest a springer. I was debating between a springer and a chessie, myself just recently. I went with the chessie because I have a couple really large (non-hunting) dogs, and wanted a larger dog than the springer. I also wanted a darker dog (my newfoundlands are black), to make picking hair off clothing easier (I avoid wearing white). I couldn't bring myself to get a black lab (like EVERYONE else).
My reasons for my final choice may be a little silly, but I'm happy with my pick so far. He is quite birdy, and a natural retriever at 10 weeks. also a real handfull of energy. Good luck with whatever you choose.