Right, so my Christmas present to myself is going to be a new iMac, and I don't really feel like paying Apple's insane prices for extra RAM. So I head on over to Crucial's website and do some checking; I've seen lots of people here saying good things about them. $81 for a stick of 512 doesn't seem too bad. But then I get to thinking: 1) Will an extra 512 be enough? I'm not exactly what you'd call a hard core power user; I don't do Photoshop or anything that intensive, and the most recent game I play (when time allows) is Diablo II and things like that. 2) Do I have to install in matching pairs? The last time I dealt with this issue with with my pizzabox 6100 (wow I feel old now). 3) Will any stick(s) of RAM do, so long as they're the proper sort (184 pin DDR PC3200 according to Crucial) or do they have to be Apple-specific? Many thanks in advance for the experience of those who are more knowledgable about this sort of thing than myself.