Computer parts comparison

[Reef]

Thinking about getting a new laptop. Few questions on which part will give the best performance / more recommended / best bang for the buck.

1) CPU
-------
3.6Ghz P4 560J Prescott 1MB Retail Box with Fan Socket 775 ($485)

vs.

3.4Ghz P4 64-Bit 630 Prescott 2MB Retail Box with Fan Socket 775 ($480)

vs.

Intel Centrino 2.0GHz Dothan 533MHz FSB1MB Cache ($470)

2) RAM
-------
1GB (2x512MB) PC3200 DDR400 ($180)

vs.

1GB (1X1GB) PC3200 DDR400 ($228)

or should I get 2Gb RAM?

2GB (2X1GB) PC3200 DDR400 ($409)

3) Video
--------
ATI X800 256MB PCI-Express Graphics Card for 9860 model ($380)

vs.

GeForce GO6800 256MB PCI-Express Graphics Card for 9860 model ($380)

------
warranty?

1 Year Onsite Warranty with around the clock support $59

2 Year "Bumper to Bumper" Warranty with Accidental LCD Breakage Protection and around the clock support $238

3 Year "Bumper to Bumper" Warranty with Accidental LCD Breakage Protection and around the clock support $309


thanks