you are correct: RAMs and HDDs (of the same spec) from different brands are supposed to be the same. but here's what we have collectively found out so far in this forum
RAM - a few users has been reporting incompatibility issues for kingston, and fewer for mushkin. corsair seems to be a safe bet. OWC and crucial is supposed to be the best, but they're not available locally.
note: u dont need 'certified for Macs' RAMs. they're normally standard overpriced RAMs.
HDD - before, our favourite here was the 500gb western digital scorpio blue, but a small number of forumers (including myself) has experience poor performance. seems like a good choice would be hitachi travelstar 5k500 or 7k500. if u have the money, seagate momentus xt is pretty fast. got even more money, splurge on an intel x25-m SSD
for ur usage, RAM is more important. try to google on how to determine if ur RAM is enough by using Activity Monitor (keep track of Page Out). also, make sure ur hdd isnt almost full...having about 30% free space should be fine to maintain the performance
but of course, upgrading RAM n HDD can only give so much performance. best way is of course to get a better machine
This post has been edited by dvlzplayground: Jul 31 2010, 12:11 AM