This is a question targeted more towards laptop gamers. I know obviously there is going to be a performance increase using a 7200rpm drive than that of a 5400rpm drive like using a desktop, but how noticeble is that performance increase going to be when running on a laptop? Specifically I am looking at purchasing the new XPS M170 and am debating the 100gb 5400 vs the 7200 drive for 300 dollars more. what I am thinking is if the 5400 would suffice a few months from now i could purchase an even larger 7200rpm drive for less still if the 5400 would do alright, but I am concerned it would be a bottle neck for achieving the best performance possible out of the system right now.

What are your thoughts?