I would do it in a second if you're the guy getting Manning and Stewart. Jackson is still a top 5 RB imo and is probably in the top 3 with LT and AD, but Manning is still the top QB in the NFL, and will end the year as a top 5 fantasy QB as usual. Stewart might be the best RB of this rookie class and could really explode in the coming weeks. Johnson, Turner and Stewart, along with Manning is a solid fantasy core and could be a championship team depending on your other players.