Hey guys.. I use my MBP for live DJing, music production and junk like that and I want to upgrade to a 2 gb ram system. Question 1: Does RAM need to be paired up? I have 1 GB from the original specs. And just need to buy 1 GB more.. but does it have to be Samsung? I read somewhere that ram needs to be paired up to work efficiently.. so that means I need to buy a 1GB Samsung stick to match my factory Samsung right? Question 2: If my MBP came with 1 GB standard, and only has 2 slots, why do they sell RAM in (2) 1 GB kits? Wouldnt it be reasonable to buy just 1 RAM stick? Question 3: Samsung Ram - $149. Memory Bank Ram - $78. Same specs. Now I dont mind paying 1/2 for the Memory Bank stick, but i dont want to be scratching my head if its not gonna perform like the Samsung. Is there really a difference? I have been screwed before on these "This is too good to be true" deals.. so if no one answers this question, then I'll gladly buy the Samsung, as i dont want to regret anything later one. Thanks in advance guys..