Hi PiratePete,
Kew are good mate. I have an account with them for all my commercial, light industrial, basic home automation and A/V gear. They are not quite as cheap as TLC which are who I use for my domestic and light commercial gear but they are close on price and they have a far bigger and better range of stock. Their service is outstanding and they will go out of their way to help you. Finally, all of their gear is top quality!
As an example, I tend to only use Eaton MEM for my LV switchgear and distribution and I get it from Kew 30% cheaper than I can get it from Eddies, now that is a considerable difference! Also, when I'm stuck for a part Kew don't normally stock, they'll be on the phone to manufacturer and part will be in branch next day! You'll wait a week with any other wholesaler!
Go down the route of CEF and you will find yourself on the brink of suicide! Their prices are astronomical and their gear is crap! The only thing redeeming about CEF, or my local branch anyway is good customer service. Other than that, visiting CEF is nothing but a time and money wasting excersise.