Ok, Well this computer will be for gaming purposes and just internet surfing also. I am 15 years old but i have a high paying job for my age. I will be aiming to BUILD a $900 gaming PC. I live in the US.  
 
I will be hooking this computer up to a 22" Vizio LCD tv.  
I have a keyboard and mouse and speakers. SO i just need the computer.
I would like it to be as quiet as possible for my range.(for some midnight gaming)
I like to play on high quality graphics.  
A big issue is i would LIKE it to be a fast computer(as fast as possible for my budget)
 
Here are some questions i was wondering:
What is easier to build AMD or Intel? (this is the very first computer build for me)
 
What OS should i use for gaming?(should probably have Word, Excel and those things)

Is this for gaming or other uses?
 
GA-P35-DS3L
Q6600
2 GB DDR2-800 Crucial Ballistix
Nvidia 8800 GTS
Seagate Hard disk 320 GB
Samsung SH203B or N
Antec 900
Corsair 520HX PSU

More choices here:
 
http://www.techreport.com/articles.x/14610/4

 
 
With as little information as you've provided I believe the people here should be able to help you just fine.
 
 
www.dell.com
 
 

Yes that would be a great gaming computer. The e8400 would also be a nice option. I love my 6600.

You cannot get a gaming computer for less than $1000 at Dell.  Under $1k and the best video card is a 2400Pro.
 
That link from Evongugg looks perfect for your purposes.  

Not true you can get a Vostro 400 with 22" monitor, E8500, 2gb ram etc for $719
 
http://configure.us.dell.com/dells [...] c4ga&s=bsd
 
Add a 8800gt for $150

CPU  http://www.newegg.com/Product/Prod [...] 6819115052

agree with evongugg...However, I would try to get 4GB RAM if your plannign on gaming...if not 2GB should be fine.
 
GA-P35-DS3L
Q6600
4 GB DDR2-800 or DDR2-1066  
Nvidia 8800 GTS
Seagate Hard disk 500 GB (or how much ever you want)
Antec 900 (also the Antec P180 and Antec  P182 or good)
Corsair 520HX PSU (other great ones to choose from)

Get DDR2-800 for a P35 board.

???i edited the original post for better clarification on what this PC is about???

Quad core is not a need for you.. but game....need a good vga card
Case: cooler master+power supply 600+ watt.  85$
Ram:  Patriot/Twinmos DDR2-800 2GB.                 45$
VGA:3870 X2 is a monster around 380$ today.  380$
Mainboard : Biostar 770 is a good chioce.            80$
CPU:AMD X2 5000+ is a budget and cool CPU.     88$
HDD:WDC 320 is fast and good warranty.            65$
DVDRW:Teac 20X is a budget high quality.           30$
                                                                          ---------
                                                                            770$

It is possible to change some like VGA card..But I think this is the best choice!

a 22" is around 200$ from acer and some others.

A couple of Quesitons:
 
1. With that motherboard, can i go with 4GB for gaming purposes?
 
2. Is the 3870X2 better than the 8800GTS (G92)? (8800GTS is cheaper)
 
3. Is this motherboard overclockable?
 
4. Would the AMD Athlon 64 X2 5000+ Brisbane 2.6GHz work fine?

?bump?

I don't know much about that particular board, but the CPU should overclock decently.  Also, consider waiting a couple of weeks, ATI's new cards are supposed to be coming out, which might drive prices on the Nvidia cards down a little.  Also, just letting you know, AMD does not make bad chips, I've got one myself, but they say that intel is faster and that you can overclock decently on some of their lower end chips.  So might consider that too.  Also, I recommend a good set of headphones.  Makes it very nice.  Personally I like the ones that cover your entire ear, blocks out lots of external sounds, even the cheap pair of coby branded ones I got for 10 bucks are great.  Good bass too, pleasant suprise.

Just remember, you wont be able to use all 4 gigs of ram if you dont have a 64 bit OS, like vista ultimate. Unless Ive been living under a rock and there is magically some way to use all 4 gigs with a 32 bit system... if so, ENLIGHTEN ME!  : )  Also, troll forums for cheaper components that can be overclocked, just dont try to go overboard with it, as it is your first system and all.

Yeah but will this layout do me good with upcoming games?