I'm working with a 317/408 source called Project-Insanity (or PI for short). It's a nice thing and I find it a learnfull thing to work with.
There are tons of snippits (google 'RSPS 317 PI [ISSUE] and you will almost always find what you're looking for) and tuturials for it.
But I am also a beginning developer and so my experience with other sources is nihil. I don't really know any other sources so I don't know wether or not PI is actually the best thing to go with.
I only have my own personal experience to offer, and I can honestly say i'm pretty happy with what i've got.