Now, there are so many brands & models of pcs & notebooks out there, so which will you go for ?
Firstly, get a pc is don't need a computer to follow you where ever you go. Major things to consider when getting a pc or notebook :-
1. Look at the processor. Recommended to get Intel. Latest one now, the Core 2 Duo model (Quad is also available, but I guess not many people will go for this higher model, unless you are a heavy gamer). If you have some extra budget, the higher clock speed the better, ie: 3Ghz.
2. Get lots of RAM. The latest specs I have seen, computer comes with 1GB RAM. Well, the more RAM installed in your computer, the better it is. Have some cash to spare? Get more RAM.
3. After sales service support. Don't forget to keep the receipt. It will be useful if your computer breakdown within a year. You might also want to do advanced research before buying from the shop. You don't wanna end up going back to the shop & found that it has been closed down for good.
Regardless of what brand or model you get, keep in mind these 3 important things.