so I've finally run out of space on my stock 80gig HDD and now I need a new one. from what I've read I need an ATA HDD, it can be 66 100 or 133 (133 is backwards compatible or something?) I should get one with at least 8mb of cache. sooooooooo is this a compatible option? I'm on a pretty tight budget at the moment and I think 80gigs will be sufficient for awhile. Thanks in advance edit: I also read somewhere that IDE limits the size of the harddrive you can use and I was curious as to what the limit was for this kind of mac?