I believe that EJ is the best young d-men out there. He represents the next generation of d-studs that plays 30 minutes a game, scores 15-20 goals and scores 50+ points per year.
Letang is a good and potentially great offensived-man but EJ is an Elite d-man, the full package, that you should grab immediately as his present injury is the only reason the he would be available.
When you factor in the emergence of St. Louis is a more offensive team and the addition of Oshie, Berglund and Pietriangelo, this deal is a must.
Take the deal, you will never regret it, starting the day he returns from injury.