Looking to switch my e53 to E70, need clarification

[greentrbo95gst]

So after painful issues with the e53 in the last 8 months BMW NA will be working on a offer to buy back the car. I need to get some clarification on few things with the e70's.
First, I understand that they dont come with the self levelling suspension, correct?
- What packages are worth it to look for?
- I noticed some cars sit higher than others, why?
- I am looking for 07, 08 4.8i
- My 4.8is has a cold weather package which comes with heated seats in the front and rear and I noticed that e70's have only heated seats in the front.
- What are some major issues (repetitive problems) with e70's? do they suffer from weak bushings and touchy suspensions as well?

Thanks for all your input.