If I were you, I'd surely also take into consideration that your naturally aspirated V8 doesn't have one of the high pressure fuel pumps that are STILL giving people problems. If I'm not mistaken, ALL of the new X5 engines come with HPFPs because they are all turbo. I love the new X5s and don't think you could go wrong with any of the engine choices but the ongoing fuel pump saga would be enough to make me think twice (though it wouldn't necessarily be a deal-breaker). As long as you like your current vehicle and the tranny issues you mentioned aren't anything too major, then I'd definitely consider keeping it, especially considering that it has relatively low miles.

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2009 E90 M3 M-DCT | Alpine White/Black/Carbon

SOLD: 2008 X5 3.0si | Black Sapphire/Black Perforated/Burl Walnut | Premium | Sport | Cold Weather | Premium Sound | Active Ventilated Seats | Auto Tailgate | Comfort Access | Running Boards | Heated Rear Seats | PDC | OEM 20" Style 214s | Titanium Kidney Grilles | Tint 20% Rear/35% Front | GP Thunder 7500K Halos | Xenesis Fogs