Time to add 512MB to the existing 128 to my new 800Mhz 12" iBook. Since this machine is my first Mac, and this my precious baby, I wanted to know what RAM make would work best. I could go for Crucial for $137, or go Kensington for $144 or go generic from 18004memory for around $90-$105. Thoughts? recommendations? experiences? Any benefits for getting the brand names? Thanks!