i got a storm 3220 in the end, it's a tad shorter, but so deep there's no chance of anything getting to the scope... + I can sling all sorts of other gear in there as well. See what you think.
Might be worth asking Ryan at Intershoot... he runs a pelicase site, which has links from intershoot. Tell him I sent you.
From what I can tell he's one of the cheapest anyway.
Remember VAT goes up next year.. ok so it's only 2.5% but it's going the wrong way