I'm not sure what the difference is between AmigaKit "UK" and "US". I'm guessing AmigaKit US is the same outfit based in the UK shipping to the States, so you should hopefully recieve the same service us in the UK get.
Anyways, based on three previous transactions with AmigaKit, I can HIGHLY recommend them. Very fast, professional service and reasonably priced. Keep it up AmigaKit!