Recommendations for media transportation case

I'm looking into this at the moment as I am making a recommendation to replace the department rucksack! I've used Peli-Case before which were pretty much adequate, and a less sturdy one which may have been the Turtle case though if Fisher-Price makes LTO cases it would probably be that one, it was pretty much a moulded piece of thin red plastic but it did the job!  Others I know of are the Storm and the Imation cases - the Storm looks similar to the Peli-Case, the Imation looks between the Turtle and the Peli.

I was wondering if anyone has any recommendations here.  We are looking for something that is lockable and reasonably heavy-duty; if I remember rightly the PeliCase has a combination lock and mounts for padlocks, the other type of case I used had nothing for locking it with, it just snaped shut; ideally we need something with a reasonably large capacity.