If you do decide to buy from Allure, ensure that you select the option to pay the 17.5% surcharge (VAT) for shipping from the UK. If you opt for dispatch direct from Israel, you'll get caught for import duty, VAT and a customs inspection fee. Additionally, you may lose the protection afforded to you under Trading Standards legislation, which you get when you deal with an EU company. (It could be argued that you're still ordering from a UK company, even if the ring is sent from Israel, but it seems foolish to take the risk of possibly losing some consumer rights).
While I've ordered items (such as a PC built to my specification) by paying money directly into the vendor's account, without any problems, I'm still a bit wary about companies which specify that it's their preferred method of payment. (A credit card is far safer for the customer).
Also, while I don't like to criticize others for their use of English, I do find myself worrying about the attention to detail taken by a company which offers a FAQs page with a spelling or grammatical error on nearly every line:
http://stores.ebay.co.uk/Allure-Diamonds/Frequ ently-Asked-Questions.html
('Viza', 'Dinners Club', 'each jewellery', 'inscripted', etc). It just doesn't fill me with confidence.
Similarly, most 'serious' businesses accept Mastercard. Allure doesn't. I wonder if that's to push customers towards using a bank transfer?
I'm sure that if you hunt around independent dealers (as suggested in response to your previous post), you'll be able to find something similar eventually.
Chris