@basim17
no need to be looking for specific regions as nearly all games are region free (there are only a couple of exceptions so far) which means that any PS3 can play any game, however, you can only find PSN cards for US and UK so you would want to use an address of one of them so you can buy PSN games but for DLC you would need the game BD (bluray disk) for the region of your account (DLC beign downloadable content and addons) so if you buy a bluray of Burnout Paradise and want to buy the add-on "Big Surf Island" the bluray has to be of US with your account being from US and using a US PSN card or US credit card.
That said, go over to [MOD EDIT] URL Removed and head to their Market Place, you will find a lot of people selling theirs, get a 40GB one (cheaper) and swap in with Laptop SATA hard drive to 320 GB it will come to the price of an 80GB one but with much more space. Remember its not just a console but a full blown media centre as well.
Enjoy!