I've seen other people's cases, even used one or two...but I would never buy anything other than a KR Multicase right now. They're durable (Yes, even the card ones, I've had mine a year, it's been thrown, gotten wet, bashed, crushed....and still looks like new), the foam is excellent (and has a multitude of options...including custom stuff). And if you order the aluminium cases you can even lock them.
At the moment I have a card single case, an aluminium single case, and an aluminium double case.
Just remember it's probably better to order direct so you can customise the foam.