Now that Chip Kelly got his man, I am pretty sure Rex will go and get his. David Harris has stated that he would like to play for Rex again and Rex clearly wants him too. This would take some of the sting out of losing Kiko for me.
http://bleacherreport.com/articles/2372284-david-harris-latest-news-rumors-and-speculation-on-jets-lb
http://fansided.com/2015/03/03/david-harris-buffalo-bills-rumors/
With the Bills trading away star linebacker Kiko Alonso, bringing in an impact linebacker like Harris makes a ton of sense. Alonso wouldve costed a ton of money if he were to sign a long-term deal, however, Harris wont be that expensive and he could even take a discount to reunite with the coach hes had a ton of success with in Ryan. If Harris does join the Bills, he will be coming to a team that led the league in sacks last season. Harris would have the best supporting cast in the league around him in Buffalo.