I've never heard of the website but a good one I know of is ibuypower.com - They have a custom computer building process with tons of options and case models along with extra features such as engraving text into the case and adding case lighting. Also, after you order your machine the process is very detailed on what stage or the factory it's in and what's been done to it so far.

I've always thought that they're good, haven't actually had anything from them myself, but they're a hell of a lot cheaper than most places, still though, best bet is to build your own one yourself, would save possibly £200 or so if you do it right

Hope I helped in anyway :)