Pros: Dual core processor, 1 gig ddr2 ram, 250gb hdd, pci-express graphics, and windows media center.  Seems like it has everything you need except a video card.  

Cons: Maybe overpriced, I could buy something like this in the US for about $500 american or $562 canadian.  Don't know if that is available to you though.  No monitor?
I don't know if that maybe an issue, you may have a good one already.

You will need to get a video card(PCI-express, not AGP or plain PCI), but no mass made
computer will come with one.  You might be ok to play ut99 without one, but you will definitely want one for 2k4 or any other game from the past 3-4 years.  A good one can be had for $100-150 american.