I have an old MacBook that has been giving me some problems lately so I decided to replace the hard drive. I purchased a Western Digital 7200 rpm 500 gb drive, which worked well. I continued to have other issues and decided it was time to replace my old machine. Just this week I ordered a new MacBook Pro which has a slower 5400 rpm 500 gb hard drive. My question is would replacing the standard 5400 rpm hard drive with a similar capacity hard drive running at 7200 rpm be worth the hassle? Would the performance be noticeable on a new MacBook Pro? (A slight reduction in battery life is not a major concern for me) Thank you!