I've never read a review of a CIT unit, maybe that's because I've only looked once or twice. The main reason is that no one reviews them properly. So as far as I'm concerned if you go with a CIT unit then you are taking a chance, which can't be recommended, obviously if you are happy to take the chance and fully realise what could happen then fair enough.
I've bought from CCLonline a few times, I would trust them. Overclockers.co.uk can be decent but atm their £50 PSUs aren't worth bothering with. Usually I think their deals are worth checking out, but you can probably only really take advantage of them when you have free delivery after having 250 posts on their forums.
Microdirect are especially good for RAM prices and selection.
Quiet PC have a UK store.
There are a lot of fans of the Be Quiet Pure Power L7 530W, altho again I haven't seen a really good review of it.
Coolermaster is decent.. They just do not have a good lineup as opposed to the likes of Corsair, Seasonic, Antec and XFX.. So its these manufacturers whose products you need to sought out first.. Keep Coolermaster in your second list..
Which doesn't look that bad to me, the only slight 'problem' is ripple and noise on the 3.3 and 5V rail are quite close to the spec, where people usually like these to be less than half the spec, but the 3.3 and 5V rail aren't that important these days, so it's better to have 'mediocrity' on the 3.3/5V rail rather than the 12V rail.
The Cooler Master Silent Pro line is something that I would consider for one of my own builds.
Other good brands include: Enermax, SilverPower and Tagan (the newer ones that use Seasonic as OEM), Silverstone. There are a lot of other brands which sell good units, but you have to check to make sure you are actually buying one of those.