Yeah it's all good. I don't think you need that sound card. almost £200 for a sound card. jeez... And no 5.25'' front bay panel :/ Pass.
I think the Asus board has Wifi. Shame OcUK doesn't have the UD5H wifi. Maybe worth asking them, if they do in case. Can always add a PCIE card anyway.
Choices, imo, the 650D, the 600T (gorgeous in white, if you're into Star Wars themes), the Fractal R3, the Fractal Define XL, The Lian Li PC-A71FB (always regretted selling my old PC-A71), The Antec P280, the Silverstone FT02 (both not in the list).
If you want quiet and understated, the Fractal R3 / Antec P280. Bit funky, the 600T / Silverstone FT02 (maybe a pain with a wifi card), if you want a big case but sleek looking, the Fractal XL and the A71FB, and the FT02 / 650D / 600T (comes with a clear panel) if you want a window.
I'm sure OcUK would build your rig in any case you want given the money you're throwing at it, you may have to wait for availability. Pick the one you prefer, any of them, and the 650D is definitely not a bad choice (loads of builders use that case).
If you want to keep the costs down, look at the GTX670. But the rest looks golden.
The display is very good, but very expensive. I suppose you get what you paid for.