Hey Guys! New member here! Question on Style 214 Wheels on my e53!

[Doms X5 48is]

Hey guys. The name is Dom and I am from Long Island, NY.
First wanted introduce myself and my car.
I own a garden center and wholesale center on the north shore of Long Island and my stable of BMW's starts with a 2005 745LI purchased brand new. We have a 2010 3.0 X5 purchased brand new.
And my daily driver is a 2002 X5 4.6is purchased brand new.

I am looking to update the wheels on my E53 to the Style 214 2008 X5 4.8 wheels. I absolutely fell in love with these wheels. I currently have the stock OEM brand new tires on all 4 20" wheels, along with the stock wheels as you will see in the picture. If I would like to purchase the 2008 model y spoke Style 214 wheels seen here at this link:
http://www.ebay.com/itm/20-BMW-X5-X6...item4603d60d25
What would I need to do to make them fit #1 on my current tires, and #2 on my chassis without rubbing? Do I need spacers? What size wheels do I currently have I think they are 20 X 9.5 in the front and 20 X 10.5 in the back? Or is it 20 X 10 in front and 20 X 11 in back? ughh I need help!
Short summation: I want to swap out my stock wheels for the new 2008 to 2012 Style 214 x5 premium 20" wheels! What needs to be done?

Here are some pictures of the car in question: