Upgrading My PC* | EDIT: Building PC - Help with parts.

[[W]TR1pin]

$800-1000 is my budget.

I want this so it can run IV btw, so give me some good ideas for that.

CPU ($129.80): http://www.centrecom.com.au/catalog/prod...s_id=36533
GFX Card ($79.00): http://www.centrecom.com.au/catalog/prod...s_id=36321
MotherBoard / MainBoard ($115.00)-($155.00 in shop): http://www.centrecom.com.au/catalog/prod...s_id=37779
RAM (2x $82.50 - $165.00): http://www.centrecom.com.au/catalog/prod...s_id=38131
Mouse ($40.00): Purchased (Not included in budget)
Keyboard ($60.00): Purchased (Not included in budget)
Case (Help- with PSU cheap): I need a case that can support obove componets ^^^
Hardrive (Help): I want around 250g or 300g, i'll buy one if needed. But is it possible to install a Portable Hardrive?, with no PC Hardrive? If no, link me a good one.
Hardrive option ($65.00): ^^ http://www.centrecom.com.au/catalog/prod...s_id=37713

When you link me a good case, can you tell me what is has in it?
Like, when i check features. It said i get cooling fan, and other things. And does it come with a DVD Drive?

Oh, can you tell me if my linked items would work together? Or anything else that i've missed?


Another:

CPU ($110.00): http://www.centrecom.com.au/catalog/prod...s_id=38406
MotherBoard / MainBoard ($119.00): http://www.centrecom.com.au/catalog/prod...s_id=33053
GFX Card ($63.00): http://www.centrecom.com.au/catalog/prod...s_id=36246
RAM (3x $40.70-$121.10-6gb): http://www.centrecom.com.au/catalog/prod...s_id=24289
Case (Help): Need help finding one.
Hardrive (Help): Does option in first work?

^^
Which one is better?, out of first + second.

If those combo's are compatable, tell me. And if they arn't, could someone search through site, find a combo ( Able to run GTA:IV on pretty good graphics) for the lowest price.

Thanks in advance

~Tr1pin