I won't try and compare the new Windows 7 to OS X in any way (though I am tempted), only to say that in one hand, it does present a more efficient way to accessing running programs than previous versions of Windows, but on the other hand, I've already been used to havng such convenience with OS X.

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Mac OS X Leopard 10.6.2
Intel Core i5 650 3.20 GHz (Threads: 4 Cache: 4MB Socket 1156)
ASUS P7P55D-LE
Seagate 80 GB SATA 7200rpm HDD (OS Drive)
Seagate 320 GB SATA 7200rpm HDD (Data Drive)
Built-in Via VT1828S HD Audio 8 channel
Built-in Ethernet
Palit Nvidia GeForce GT 240 512MB 128bit HDMI PCIE
2GB Kingston DDR3 RAM 1333
Monitor: Viewsonic VG1930wm 19" Widescreen
Lite-On DVD-R/RW IDE Drive