I just got a Mushkin 240gb SSD for my White macbook. Previously I had a 320GB 5400RPM WD. For anyone on the fence about this, for ~$200 (newegg.com) it was totally worth it. Boot time is cut by at least 20% (more like 50), Apps launch faster, web browsing is improved and battery life is about 20-30 minutes longer (that's a lot on these old machines lol!) I also got a new ~$60 battery from batteryedge.com (I had bad luck with an Amazon.com cheapie previously, and the original battery blew up). I really feel this breathed new life into this oldish machine. The best part is I bought a $7 USB-powered all-metal screwless enclosure for my 320gb platter so I can use that as sleek external storage / time machine. I also maxed out the RAM (4GB isn't much though ). TL: DR; I'd highly recommend upgrading the HD to SSD if you have one of these machines. Buy a good SSD and if it doesn't work out, you can always throw it in another mac if you have one or use it in a new Macbook in lieu of paying Apple's outrageous HD tax.