I have no affiliation with this add, but here is a set for sale for probably less than what you would pay for tires plus install.
The other benefit is that when you go to return your X5 you can sell these wheels to recover most of the cost.
Current BMWs;2013 Carbon Black X5 50i M-Sport PP
2010 Alpine White 135ia M-Sport
2010 R1200GS Adventure 30th Anniversary Edition,(On Order)2014 S1000R
Past BMWs; 2010 Carbon Black M5, 2007 Graphite K1200GT, 2008 335ia, 2005 545i, 2004 R1150R, 2003.5 M3 Cabrio, 2000 540ia, 1997 M3 sedan, 1997 540ia