If your doing heavy video editing or using photoshop i would say mac has the better package on their side than windows.
Their adobe photoshop is a lot better than windows version,but if its for general use i would just upgrade or keep your current system.
As for saving space you can always go sandy bridge and get like those small media HTC case or something similar.
PSN: kurosagi01|steamid: phalanx-88| xfire: itachiasuka
Laptop: HP Compaq 6735s
AMD Turion X2 2.0GHZ|4GB DDR2 667|250GB HD|ATI Radeon HD3200|Windows 7 Ultimate 64-bit