I take ba213 about once a month and this time of year immigration is empty when it lands not much else comes in then, flight times also tend to be a little shorter this time of year depending on the routing, on security and where to reclear I might opt for e because at two in the afternoon it tends to be pretty light whereas b has been pretty bad my last few times thru, March you will also hit the chaos that is spring break. One other reason I would tend to go back thru security in e is that the there is a fair amount of construction going at terminal e and every time I land there is something new and different going on you will avoid all such potential issues by walking between terminals inside security. But no matter what you have more than enough time