Registered a few days ago and have been browsing the site extensively to get to know a little more about the X5. Loved the site and community and hope to be along you guys

So, I have decided to purchase an X5 due to two important things:
1 - Reliability. I am a proud owner of a 2008 320i Convertible (you can see my “self build” here on the e90 forum: http://www.e90post.com/forums/showthread.php?t=847502). Love my car to death (Wife does not think so

2 - We are expecting! Yea, we are having our first baby (due in April) and I do need more room for all the things that come along when you carrying a family around! So the X5 has always been our first option on the list. Wife also loves it when she sees one and when you make your missus happy, you get her on your side for some more mods

I have set my eyes on two at the moment, they are from the same dealer and similar mileage except for a few features:
http://www.autotrader.co.uk/used-cars/b ... ars-twt001
http://www.autotrader.co.uk/used-cars/b ... ars-twt001
Does the price seems high for the year, mileage and features? Also this dealer offers AA warranty, anyone familiar with it? Has anyone purchased from this particular dealer before or any experience with it?
Really looking to get all the features I can, 7 seater and registered in 2012 > are what Im after and budget is around 35k.
Im not a great negotiator either, so any tips when approaching this dealer are welcome, what should I say over the phone, etc
Although I love cars, I am not an expert, so any help is really appreciated specially buying such an expensive car!
Thanks guys!