I've bought myself the "basic" macbook pro and now I was thinking of upgrading the memory and its harddrive bymyself I figured out that I can buy the RAM and the SSD approximatly 100$ cheaper from online retailers like Newegg.com. So what I'm curious about is the effect of an Samsung ssd and the upgraded memory (from 2gb to 4gb and from 160gb hdd to 128 gb ssd) .. my special point of interest is regarding the battery runtime. The 6h is great but is there any improvement possible with the switch to ssd? Does it currently make sense to change or would it make sense to wait a bit longer before changing??