Suggestions for ultraportable laptops

Hi,

我想請教各位可不可以推薦幾個ultraportable laptop. 我個人是想要一個接近12 吋的筆電
我列下幾個筆電希望各位有這幾台的可以說一下他的好處與壞處

Thinkpad X61s ($1360 US)
L7500 1.6GHz
100 GB 7200 RPM
2GB RAM
Intel X3100 Integrated Video card
12" LCD without camera
Excluded optical drive
Battery life??? (unknown)

Sony TZ($2499.99)
U7500 1.06GHz
100GB 4200 RPM
2GB RAM
11.1" LED backlight with integrated camera
Intel 950 Integrated Video card
Included optical drive
Battery life(10hr+)

Toshiba R500($2200)
U7600 1.2GHz
120GB 5400 RPM
1GB RAM
12.1" transreflective Display
Intel 950 Integrated Video card
Included optical drive
Battery life(10hr+)

我知道電池持久力是相關很多東西的 只是estimate
我是希望可以是輕的 電力久的
請各位可以推薦一下買哪一台 或是推薦其他的筆電

現在個人是比較傾向 X61s 因為我可以拿到便宜的價錢

謝謝~