I voted Long and Cook. Everything I've heard says that Long is a good guy, and was an important player for years. But unless he renegotiates and take a huge pay cut to reduce his cap hit, there is no way the Rams can keep an aging player with so huge a hit.
Cook has a big cap hit, and frankly hasn't even been close to worth it. Add in that the Rams want a reliable TE who can block along with catching a few, and I see him gone.
Cap savings for cutting Foles is pocket change by NFL standards. And they would get the same savings cutting him immediately or as part of the final cuts before the season begins. So no real reason to cut him now. I could see them trading him to a team that wants to gamble and thinks they have the line to support him - probably not for much, but a late round pick.
I don't see JL being cut. He's not that expensive for a decent starting MLB. He's not a huge star, but he's reliable and calls the defense effectively.
Saffold should be cut, but with all the OL problems they have had I don't see it happening, at least until the Rams have a replacement in hand.
Britt is a bit overpaid - but I think Quick is gone - he doesn't seem to have come back from his injury. Bailey is likely through. Austin's great, but not really a WR. The Rams just don't have the depth to cut somebody like Britt.