Do I need a Lappy?

Eyeing the MSI Wind... but am caught in a dilemma due to the following....

For :

• the current PC is nearing 5yrs old. its time to upgrade
• the MSI Wind is so chio
• can get it @ special price
  
• I've always wanted a laptop
  

Against :

• my existing PC is still alive
• 'nuff said...
  

How now, brown cow?