My advise would be to check out the Bespoke PC Builders web sites and see what cases they are using for their high end Pc rigs.
Try Beastcomputers.co.uk , Vadim.co.uk or even the Custom pc magazine. This month they recommend the AntecP180 £83.36 or for a slightly lower price the JeanTeach Phong 2 at £49.99
There are so many cases to choose from why not go for what the 'experts' use
You know it makes sense....................