Not sure what Ammar is talking about but my survey says that in Islamabad you can find mostly NTSC-J pirated games or the ones which are not region specific will work for you.
Hence, if you want to buy a console here, the PAL version is 5-7k cheaper than the NTSC-J version.
Now if you plan to ever hook up your LAN port or a WIFI dongle in the USB port, dont even think of modding it, and I will not be surprised if some future games require a certain firmware version to run which will need you to go online for an update the modding is done on the DVD ROM drive and not the main firmware of the XBox360, and you can not even play pirated offline, because that information is kept in EEProm only for M$ to sniff later, your HDD will be crippled after a ban so 120GB wont be even equal to 20GB.
Everybody wants to go online because of all those achievements / trophies and facebook integration which publishes your progress to all your friends
So if you do not want to play pirated then the other problem is you will not find many original games for XBox360 here (at least Islamabad), while with the PS3 not playing pirated games till now, you will find enough original games in the market, moreover, it has future and standard technologies built-in like BlueRay, Bluetooth (controllers, keyboards, mice), USB (most PC accessories work out of the box).
I hope this helps you.