I use an SKB two-rifle case. I am on my second one after the first one was trashed at Jo'burg airport by a thief with a crowbar. He wrecked the case but still didn't manage to get to my Anderson Wheeler .500NE double-rifle inside. That case was some of the best money I have ever spent. If your plans are limited to Europe then you can afford to skimp a bit on a case; however, if you plan to hunt in Africa at any point, spend some money and protect your rifles.