I'm gonna be at the Linc (Philadelphia Eagles stadium) tailgating and then watching the draft on the jumbotron. Should be a good time!
The one assumption you're making with Atlanta is that it is easy to trade down. Nowadays, teams are very weary up trading up because they are guaranteeing $20-30m to a guy who has no played a down in the NFL.
Also, do not assume the Falcons will have a high pick next year. The Cowboys made a trade with the Browns last year expecting the Browns to stink and have a high draft pick. The Browns ended up decent, thus the Cowboys only ended up with a pick in the 20s.
From what I've read, the Rams are going to take Glenn Dorsey from LSU. Chris Long goes far beyond what his blurbs say about him. He's has by far the highest floor (least potential of bust) of the top 4 or 5 guys. The Rams have no need for a defensive end. They already have Little and Carriker (last year's 1st round pick), who they played at DT because they had no one else. Carriker would move back to his natural end position if they take Dorsey.
Lastly, don't be surprised if KC takes Clady or Albert. They need help at a bunch of positions, but the quickest way to make your team better is to shore up your offensive line.