在美x40和x31价差不多，该选谁呢？ [复制链接]

ThinkPad X31 (IBM Think Express Program)
2884CRU
Customize
& buy
  $1,599.00*

256 MB
40 GB
  12.1"
1024x768
16MB ATI Mobility RADEON
3.6-3.6
  None
None
  
ThinkPad X40(IBM Think Express Program)
23865FU
New!

Customize
& buy
  $1,699.00*
256 MB
40 GB
  12.1"
1024x768
Intel Extreme Graphics 2
  None
None
  Integrated Intel PRO/1000 Gigabit Ethernet
None
Intel PRO/Wirel  
ess 2200BG
IBM Embedded Security Subsystem 2.0
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另外从美国带机子回来得注意点什么呢？各位建议一下，谢谢了。。