great, so a new rig for you. I posted one link earlier, maybe you take a look at the specifications there, so you know what parts you need. That's a decent prebuilt pc but I know you can certainly DIY and make yourself a good rig you like for less.
So yeah, in any case, newegg is good place buy computer parts, very reliable, good customer service, but as far as I know, you gotta be living in u.s.a. else they can't service you.