RE: Best 1st Shotgun?
Of the semi's that you listed I would go with the X2. Very durable, easy to clean, soft shooting, faster pointing, and will cycle most anything. Might take a look at the X3 too.
Ifyou want to go with a pump take a look at the Browning BPS, or an Ithaca 37 (new ones are pricey, but worth it).