Multiple laptop choices.

[FormulaUno]

Hello

I'm going to buy my first laptop, but I have difficulty choosing between:

Acer Aspire 7551G 699,90 €
17,3"
AMD Phenom™ II X4 N950
6 GB DDR3 RAM
Radeon™ HD 6650M 1GB
500 GB HDD

Acer Aspire 5553G 699,90 €
15,6" LED
AMD Phenom™ II X4 N950
8 GB DDR3 RAM
Radeon™ HD 5650M 2GB
500 GB HDD

Acer Aspire 5552G 599,90 €
15,6"
AMD Athlon™ II X2 P340
8 GB DDR3 RAM
Radeon™ HD 6650M 1GB
500 GB HDD

Acer Aspire 5552G 535,00 €
15,6"
AMD Athlon II X2 P340 2.2 GHz
4GB DDR3
Radeon HD 6650M 1GB
500 GB HDD

Can all of these play F1 2010 on high settings?
Also, what kind of improvement can I expect from:
S478 P4 2.6Ghz Northwood
1GB DDR
7600GT 512MB AGP