Need advice on laptops..

I am maybe going to get a laptop but was wondering which is better. My price range is pretty low so I have found 3 possibilities.
1. Lenovo N500
- 15.4" WXGA LCD
- Intel celeron 2.0Ghz
- 1GB DDR Ram
- 160 GB HDD
- Intel GMA 4500M
- Bluetooth, lan, Wi-fi, webcam

2. HP Compaq NX558
- 15.6" HD Bright LCD
- AMD Athlon x2 Dual core 2.1GHZ
- 1GB DDR Ram
- 160GB HDD
- ATI Radeon HD 3250 Graphics
- bluetooth, lan, wi-fi, webcam

3. Gigabyte Q1580L-A71DZA
- 15.4" WXGA Glare type LCD
- Intel Celeron M585 2.16GHZ
- 1GB DDR2 800 Ram
- 160GB HDD
- Intel GMA 4500M
- Lan, Wi-Fi, webcam

Which of these is better for light gaming? Also what pixel shader and memory does the Intel GMA 4500M and the ATI Radeon HD 3250 have?

I'm not a gaming expert, but you gotto want more RAM than 1Gb. Not to mention the display size needs to be bigger, but depends on what games i suppose.

I dont mean games like crysis, gta4 and stuff like that. More like nfs most wanted, resident evil 4, call of duty 2 etc. Im not sure but I think those laptops are better than my desktop pc because I only have a Geforce fx5500 and a 2ghz processor and 1.5gb ram. I would get extra ram for the laptop if I get it.
I am getting the laptop for christmas so I cant really choose the budget.
My friend has a Lenovo N500 and can play The Club, Most Wanted and other games on it.

It's hard cos they all have similar if not the same main incredients. What are the costs of them?

They are around 530 dollars. The display size isn't a problem because my desktop screen is also a 15".

Then i'll go with the Hp. :)

The T42 is a very old product. and i would not buy an IBM/Lenovo old/refurbished product. I am using T60 and it's 2 years old. Buy new is best.