Only concern is Zoloft (sertraline) was not the "logical" choice after Celexa (GP let me choose), that there's a definitive SSRI (say Paxil) to try bef SNRI switch?

Half and half. There are few definitive anythings when it comes to psychotropic medications. If you're thinking about switching to an SNRI anyway, you can try something that works on both Serotonin and also Norepinephrine, like Effexor (venlafaxine). That might give you an idea whether you're going in the right direction.

Related Questions

After trying Celexa and then Zoloft, (sertraline) for anxiety & depression, with no response— is it clear cut if one should try another SSRI, or switch to an SNRI?

Probably snri. Snri most likely but everyone is different--some people do better on the older meds some with augmentation etc--if someone in your genetic family has similar sx & is doing well on something that is probably the best thing to try. Read more...