I personally wouldn't recommend the Diago's, especially the bigger ones if you're going to be doing serious touring. They are just chipboard.
The guitarist in my band had the Tourman and it constantly falls to bits, he's replacing the hinges and catches all the time. Meanwhile, I bought a large mixer flight case (full flight ATA) brand new from a small flight case company from their 'bargain bin' for £50 and two years later and loads of tours and a few fligts later it's still going strong.
I'd say go NSP or Spider. Or watch out for cases on used cases on Ebay. If you want a largeish one look for mixer or keyboard ones. Generally, ones made specifically for pedalboards are loads more for no good reason.