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		There's also the Bootcamp option: just boot straight in to Windows instead of using a VM.  With Parallels you can actually do both- run your Bootcamp partition as a VM from within OS X, or skip Parallels and boot directly into that partition. 
 
I own Parallels but rarely use it- I just boot into Windows instead, so I can't answer your question about whether it can use dynamic RAM.  I know that by default it wants to allocate a fixed amount (e.g. 1 or 2 GB) to the VM. 
 
If it's just Outlook and Office you're after, you could just get those for Mac (it's an option anyway).
		
	
		
		
		
		
			
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				64 GB iPad 2 WiFi, Apple TV 2, 32 GB iPhone 4 
Early 2011 MacBook Pro 13" (dual boot with Windows 7), Early 2009 Mac Mini			 
		
		
		
		
	
				
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