Help with Upgading Rig

My current rig.

Manufacturer: Gigabyte Technology Co., Ltd.

Processor: Intel(R) Core(TM)2 Duo CPU E8400 @ 3.00GHz (2 CPUs), ~3.0GHz

Memory: 4096MB RAM DDR2

Hard Drive: 1 TB

Video Card: ATI Radeon HD 4800 Series

Monitor: Samsung SyncMaster 2243

Sound Card: Speakers (Realtek High Definition Audio)

Motherboard: GA-P31-S3G. Socket 775

I need some help on upgrading it.

Please no Intel I7. I aint that rich and i wont install it either. Feel free to suggest a new motherboard too. Something for gaming though.

http://www.tomshardware.com/reviews/overclock-benchmark-build-a-pc,3163.html

Also, Ivy Bridge is coming soon (3 weeks). Keep an eye out for dropping prices on Sandy Bridge parts. Nvidia just released the 600 series so expect 500 series cards and 7000 Radeon's to get a price cut.

I7 299$ .
i5 189$ rebate.
Both 3.4ghz Amd eq are like 20-50$ cheaper roughly.

https://www.fakku.net/viewtopic.php?t=50838#1520275

Ask on the buildapc subreddit. There's a lot of knowledgeable people there (including myself) who can offer you suggestions.

If your going for gaming, maybe go for 8 gb RAM(4 gb x 2 chips)? If your gaming on stuff like battlefield 3, theatre of war, I would recommend that. And RAM is cheap nowadays.