I'm trying to decide between getting a 15" MacBook Pro with the160 versus the 200 GB drives. Just curious what people's thought are the pros and cons of going with a larger, but slower drive. Here's an excellent head-to-head test which appears to be basically a toss up. Their conclusion: CONCLUSIONS These latest test results reveal that, a) The 7200rpm drives are the fastest when empty... b)... but if you have 74GB of data on each of the drives, the 4200rpm drive was actually faster. That's because 74GB of data puts the 7200rpm drive at 80% capacity while the 200GB 4200rpm drive is only at 40% capacity. (See "74G Mark" graphs above.) I suppose this should answer my question -- but thought I'd see if anyone has other thoughts about this. Thanks!