I agree with the OP's pool of the best teams in the NFC. The order of thier prospective individual divisional finish is debatable.
It is unlikely that the 9ers will beat Green Bay, Seattle, sweep St Louis and beat Atlanta and emerge ahead of the Seahawks in the NFC West. SF is a very good team but they are probably slightly less the juggernaut of last season with the loss of thier most dominant WR, Eric Crabtree, and thier best DB. Of all the "running" QBs in the NFC Kaepernick is the most likely to be diagnosed and prepared for as he runs a "pistol" as opposed to say Wilson dealing in a "read option" which just extends the plays as opposed to Kaepernick looking to run. The Rams and the Seahawks have two of the best defenses in the NFL as evidensed by SF and Seattle both having trouble with the Rams last season and probably still will. Wilson is harder to defense than CK and Seattle has made major improvement in the offseason over what was argueably the hottest team in the NFL at the end of last season. Also Seattle upgraded its running attack and recieving corps this preseason as evidensed by Michaels and Williams leading the NFL in running and recieving stats. This on the team that punnished the 9ers in week 16 last season 42-13.
All THAT said the Seahawks will win the West NFC with the 9ers taking the WC. The REAL battle will be home field advantage where Seattle and Atlanta will fight till probably very late in the season for that advantage. If Seattle wins HFA they will be in the Superbowl and crush the Broncos. This scenerio could repeat for 3-4 seasons.