seen a few similar threads regarding this. but didn't really get the right answers. basically, i currently have a macbook with 1GB ram. over on overclockers uk you can buy a 2GB set right now for £24.99 (roughly $49), or i can go for the 4GB set which would set me back £74.99 (roughly $146). i'm just wondering, if any of you lot have experience with 2/4GB RAM, how much would the 4GB benefit me over the 2GB? would i get the extra £50's worth of performance out of it? would i be at a severe disadvantage if i went for the 2GB? would i cry into my pillow every night from here on in filled with regret? macbook is used for itunes/adobe creative sweet. thanks.