Hello Rikki
Extra memory will allow you to run more instruments and load more sounds into your Laptop, so access will be quicker.
If you use a lot of Effect Instruments (Which take a lot of processing power) then a faster CPU is always beneficial.
A faster Hard Disk helps if you use instruments that use Disk Streaming of sounds, (Such as Colossus, Gigasamples, etc) however 7200 RPM drives for Laptops are still expensive, and have the disadvantage of producing a lot more noise, and reduce the length of time you can use the Laptop on Battery power. (I would also go for a minimum of 80GB Hard Disk Size)
Therefore decide what instruments you will probably use, (Consider the Future) and use the above information to choose what you need.
Go for XP Pro rather then XP Home or XP Media Centre.
Hope this helps.
Bill
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