LOL, you guys are not making it any easier
i was leaning more towards the M&P, then find out i don't really like the jointed polymer trigger (but i like rest of the package)
and then i thought i wanted the XD 9 ... until i started thinking the GLOCK 19 compact isn't all that bad either with the smaller size and 4" barrel. the accessories and mags are cheaper on GLOCKs, the ability to (potentially) use the mags from 17 or even 18 (shouldn't really matter cause CA is a "10 rd mag" State, but its a nice to know that it can be done), there are endless accessories options, and its simple with proved reliability.
... i feel like i am back to square one
but for the light, i think i am going with TLR-1, so pretty much same job, being reliable and at a lower price