Personally wouldn't go for a Sony, but if that's what you've chosen then go for it!
Make sure you buy with a CREDIT card not a debit/charge card, so you have some fall-back should anything go wrong. I noticed that the retailer is a member of RETRA as well (Radio, Electrical & Television Retailers' Association) and their members have to comply with a code of practice etc. http://www.retra.co.uk/code_complete_con.htm
Also do a search for the name of the retailer on the forums to check if there is anything to look out for.