The i7 970 is virtually identical to the W3565 except for two very significant differences:
The i7 is a hexacore vs. the Xeon's quadcore
The i7 is a 32nm process vs. the Xeon's 45 nm
SolidWorks 2011 should work perfectly on either, so the i7 hexa has a marked advantage. As for your video card, as long as you can find it on this:http://www.solidworks.com/sw/support/videocardtesting.html
You're fine. However, I'm seeing primarily Quadros and Fires on there so keep that in mind.