New gaming rig help please!

Do you have the GPU in your computer now?

For people that want all the info.

Approximate Purchase Date: In about a month

Budget Range: $600

System Usage: Gaming, watching livestreams

Monitor: Already have one

I need an OS

Preferred Website(s) for Parts: the cheapest

Location: South Carolina USA

Parts Preferences: Intel

Overclocking: No

SLI or Crossfire: No

Monitor Resolution: 1024x768

Yes I do

Don't expect better settings than you get now. You would have to upgrade the video card.

How much of a better card?
And also my computer is running an intel cleron 450 2.2 ghz single core processor which bottlenecks my GPU, but I get 60 fps give or take a few in WoW just questing, when other people come into play is when i start lagging.

I would recommend an hd 7850 for the games you want to play.

Get an i3 3220
an h77 motherboard
a corsair/xfx/seasonix/antec PSU. 500w will be enough
an hd7850
8gb 1600mhz RAM
A case you like that isn't super expensive
a 7200rpm HDD

Do you need a copy of windows?

Yes i do for the new pc. Thanks for all your help.

PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU: Intel Core i5-3470 3.2GHz Quad-Core Processor ($179.99 @ NCIX US)
Motherboard: ASRock H77 Pro4/MVP ATX LGA1155 Motherboard ($87.55 @ Newegg)
Memory: Mushkin Blackline 8GB (2 x 4GB) DDR3-1600 Memory ($35.57 @ NCIX US)
Storage: Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive ($64.99 @ NCIX US)
Case: Cooler Master HAF 912 ATX Mid Tower Case ($51.52 @ NCIX US)
Power Supply: Corsair Builder 500W 80 PLUS Bronze Certified ATX12V Power Supply ($49.99 @ Amazon)
Optical Drive: Samsung SH-224BB/RSBS DVD/CD Writer ($20.58 @ Amazon)
Operating System: Microsoft Windows 7 Home Premium SP1 (OEM) (64-bit) ($89.98 @ Outlet PC)
Total: $580.17
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-01-15 22:21 EST-0500)

This is something to think about. It will be very good. Your GPU will hold you back the most until you upgrade it. You should still get medium settings in modern games though.