Raven V2 which OCUK have listed is incredibly similar to the Silverstone FT02, with the only real difference being different top/front design/led's and the hard drive cages are different.
The FT02 is like a marginally improved Raven with a facelift, and in Alu. The difference is the Raven is £100, steel and probably quieter as in my experience steel kills case vibrations, better insulates against noise aswell as being cheaper. Even Alu case I've used has been louder.
I was very close to buying a Raven but its a little too small.
Really I just don't understand it, under my desk I just have so much room its ridiculous, saving a couple inches here and there makes no sense to me at all. A Raven that was 2 inches longer 2 inches taller and 2 cm wider would give you a larger area for the mobo to sit in, let it support basically any mobo you can buy, and give that much extra room to stick cables out the way on the other side of the motherboard tray. In every case I've fitted because molex connectors aren't small and you've ofter got lots of connectors on cables stuck around the back it just becomes more ackward, 1 or maybe 2cm extra in width would mean plenty of space and make cable management that much easier.
Why won't anyone build the perfect case damn it
Seriously though, the Raven V2 is probably the best air cooling case around, quiet, simple, smart design, still plenty of room around the mobo, just that their could be a bit more.
E-atx is only wider, not longer, atx-xl(not sure its an actual standard or made up) is longer and wider, usually offering a 8-10 pci expansion slots. Look up EVGA, Gigabyte and maybe Asus top end ridiculous boards, Gigabyte has something coming out at £450!!!!!! Its got a simply ridiculous number of pci-e slots.