I believe 2010 (the LCI) has revised taillights, front and rear bumpers plus more importantly 8 speeds gearbox and revised diesel engine. (180kw compared with 160kw)

Personally I would get the LCI version than 2009, the 8 speed gearbox is worth the extra.

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'07 X5 3.0d - Black Sapphire Metallic / Camel interior
Specs: Sport pack, Executive, 7 Seats, OEM 336, Hifi
Mods: Aero Kits, Titanium grilles, 4.8i exhaust, Tinted, ///M Footrest, OEM Sport pedals, OEM Rubber mats, OEM Sunshades, LCI Taillights