I own a JBL e401, I would say that I prefer them to my classic Eheims. They are very efficient (very low energy consumption), silent and easy to clean/manage.
All the models include levers in the inlet and outlet, although in most places you will hear that it is not advisable to use them in the long term as it can damage the filter and produce leaks (due to over pressure? Not sure, I am not an expert). I was a bit worried at the beginning because my e401 (400 lph) is switched to a 21 liters tanks... so I have a 19x turnover and a canister volume of 4 liters (20% of the tank volume!). But you know what? It's the better choice I've ever made. The flow is perfect and I am not adjusting it.
I am seriously considering to buy a JBL e901 for my 60 liters tank (that is currently using an Eheim 2215 rated at 620 lph). 1/3 more flow with less energy consumption and more media volume.
Jordi