I think for the best quality for the money airlift XLs are the ones for me, how did you find the e level??
Definitely, XLs would be my choice too. The E level system is just amazing, if you have the cash (it is a lot) then go for it. My golf was the first car in the UK to have it fitted in 2009 and no one had ever heard of Accuair and didn't really pay attention but now they are all over the UK and rightly so. The system manages everything for you, you don't have to do anything unless you want to, I used to dump mine via the remote when I parked (the reactions I got from that we're quite amusing) and then when you get back and turn the ignition it rises up to ride height, if I were ever to get air again I wouldn't hesitate to get it, it makes a huge difference. Check out their website it explains the system much better than I can.