I drove a 3.slow the 4.4then 4.8 they all have different charaterstics its all about what you ultimatley want i felt the the 3.0 was underpowered the 4.8 nice power but the price was really not worth the extra hp my 4.4 has a good balance for myself and wife if i want to got rip it wont be in the x5 it will be in my e46 m3 :thumbup: oh yeah also gas mileage pretty much the same so let your butt dyno decided

it comes with a plate that has adhesive on the back ( number 3 from left in top arrow in the picture of accessories that you posted) ...i can use the suction cup holer then... not the best pay to do it but will work...