Quick question...I have searched, but I need clarification

I have a 2001 x5 3/2001 build I have the small (split screen navi, not 16:9) I assume I have MKI what version do I need to download for the upgrade? Also which CD( I assume I need a cd not DVD) do I buy to get upgraded maps, checking eBay just not sure which one to buy? TIA

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2013 X5 35D
2015 F350
2009 E90 M3
2007 GT3
1996 993 C4S
1991 964 Turbo
1994 D90
1989 E30 M3
1988 E30 M3
1972 cutlass supreme


-sold-
1993 E34 S52 supercharged wagon
1988 E30 M3 henna
2002 E46 M3
1997 E36 M3
2001 X5
2006 4.8is
1998 e36 M3 track car
1995 e36 M3 track car