Now I know the first will give me long battery life and the second in theory better performance. Is is significantly better? I do like long battery life but 1.3GHz just feels very outdated. I don't plan to play games but do plan to watch HD video, multi-task a lot, etc.
Your input? Again the main thing I am debating here is the CPU in each laptop and whether it's worth it to buy SU4100 CPU for the battery life.
I would go with the second one because of having a faster CPU(Which you'll benefit in multi-tasking),and having more RAM/HDD and a better VGA.
As you mentioned,the first one will give you a better battery life but for watching HD videos and Multi-Tasking i would recommend the second one.