My sister's old PC is finally in need of a change (AMD 3200+, 6600GT) I suggested she get a laptop since she often watches TV in another room and walks back and forth to her PC. Now she has a lot of joint pain and so can't walk around. Looking for a laptop with decent battery life and small size/weight around $500 (i3 or i5). She really loves the idea of an ultrabook but the low power/speed processors are a real turn off. Her usage is limited to Youtube HD, Online radio streaming, Flash games on Facebook, 720p or 1080p MKV videos. I see a lot of Lenovo options which are quite confusing at different model numbers and sizes. Z500 looks good but lower battery life.