U know that PCI-eXpress is better than AGP.... if u r getting brand new comp. u need to get PCI-eXpress cause they arent making much more Graphics cards in agp form anymore.
I would myself get a 19 inch Screen
I would think that ur ram is good
(no matter what everyone else says... there all the same, cause i promise someone is going to say that u need better ram
The processor is DECENT... i wouldnt consider it average on a gaming comp. but its aight
The graphics card is good.... but needs to be PCI-Express and so does the motherboard.
Speakers........ arent kickass.... they are low grade.
They are good for games.. but music.. ahh der horrible
I would suggest getting a sound card for anyspeakers that cost more than $100 USD
I wouldnt use the power supply that comes with ur case...
Get a good powersupply with above 400 wats and a GOOD BRAND
The case will always dillever the same cooling as far as the structure goes, but u will probably need to get more fans. (in my opinion)
Dont forget about getting a good keyboard and mouse. Espically if ur gaming.
I cant really look at teh harddrive cause neweggs page is currently unavailable. but i would suggest about 160Gb in total space (minimum)