IMO I like my G19.
It conceals fine for me.
IMO I don't like the .40 round. I prefer 9mm or .45.
IMO The .40 is a compromise between the size of the 9mm and the power of the .45. I don't like the recoil of the .40, I can shoot .45 or 9mm better.
Currently I am carrying my G19 for a couple of reasons
First, I like the 16 rounds better than the 8 my Kimber offers.
Also I haven't had the Kimber long, and although it hasn't had any issues so far, I still have to put another couple hundred rounds through it before I will completely trust it.
So picking between the two guns you said, I would choose the G30.
Only my Opinion.