Question bout dell laptop(CPU)

The dell in my country provides Sli 8700M GT and 8800M GTX i was wondering how much ram should i get and which GPU would go best with which CPU

Here's r the CPU available for XPS M1730

Intel® CoreTM 2 Extreme Processor X7900 (2.80GHz,4M L2 Cache,800MHz FSB)

Intel Core 2 Duo Processor T7700 (2.40GHz,4M L2 Cache,800MHz FSB)

Intel Core 2 Duo Processor T7500 (2.20GHz,4M L2 Cache,800MHz FSB)

Last question what drive should i get raid0?singel drive or solid drive?

If I could afford solid state drive then I would get it even know the standerd for ssd is 60-80gb. though they are expensive.TrooperManaic

Whats the differents of solid state and raid0?