Computers, other than voltage, are pretty much compatible globally. I love the newer power supplies that work either 110 or 220 volt. Cost seems to be fairly reasonable, but they don't have much in the way of computer parts and components if you like to tinker with building or modifying your PC.

Video stuff: They do both PAL and NTSC here, just depends on what you buy. Just make sure you confirm which format it's in before buying a TV, DVD player, camcorder... Make sure you check your DVDs or DVD players to ensure they're in the same region. Otherwise they may not play.

Voltage: If coming from North America, the 110/220 voltage thing is a real problem. You have to have voltage converters for every 110v appliance. Those can be expensive. Might be worth just buying new appliances (I did).