So which one would you recommend?
All of these online retailers are reliable and you will see plenty of feedback on internet. I haven't included any retailer I hadn't heard of or wasn't reliable enough...
1. wowhd - Used them long time back when they were "wow-cd". They were ok but it took 2-3 weeks for th egame to arrive and they usually shipped via Hong Kong.
2. dvd.co.uk - Again used their service long ago and they delivered within 2 weeks.
3. shopto.net - Probably one of the more renowned retailer and you should be able to use them. I ordered with them but cancelled the pre-order as another retailer (hmv) actually shipped the game first. Pity hmv is no longer in business, but I didn't have much poblem cancelling my pre-order with shopto.
4. thehut and zavvi are pretty reliable and are known to ship to North America but haven't used them.
Haven't used playasia as well but heard good things about them with a rider that sometimes they take 2-3 weeks to deliver and ship via Hong Kong. yesasia is pretty much the same, and I would prefer a European/UK retailer so I know the game would be a European one (i.e. BLES instead of BLAS) and I don't face much problems with DLCs.