i got a 17" powerbook with 512 ram. id like to get some more ram, here in canada the price is. 512mb $169 1gig $369 and as you might know the powerbook only has 2 slots. does adding another 512 make that big of a difference? and would there be an even bigger difference with adding 1 gig, or is that just over kill. i use lots of apps like logic, dvd sp, flash, games like C&C, RoN.. everything seems to run fine as it is with 512 MB of ram(or i could have just gotten use to only having that much) anyways whats you thoughts???