BMC Alpinecahllenge Sizing Help

I am planning to buy a BMC Alpinechallenge AC01 (http://www.evanscycles.com/products/bmc/alpenchallenge-ac01-alivio-deore-700c-2012-hybrid-bike-ec031085?query=ac01) but I fall between medium and large size.
Has anybody had some experience with the BMC Alpinechallenege bikes and their sizing? Can somebody advise me which size I should go with.
My measurements are:
Inseam or Leg Length (cm)=85.00
Trunk (cm)=65.75
Forearm (cm)=35.00
Arm (cm)=61.00
Thigh (cm)=59.50
Lower Leg (cm)=54.50
Sternal Notch or Head of the breast bone (cm)=145.00
Pelvic bone height (cm)=105.72
Total body height (cm)=178.00
Weight (kg)=79.50
The BMC sizing table is here:
http://www.bmc-racing.com/us-en/bikes/2 ... deore.html
Click on the geometry.
Has anybody had some experience with the BMC Alpinechallenege bikes and their sizing? Can somebody advise me which size I should go with.
My measurements are:
Inseam or Leg Length (cm)=85.00
Trunk (cm)=65.75
Forearm (cm)=35.00
Arm (cm)=61.00
Thigh (cm)=59.50
Lower Leg (cm)=54.50
Sternal Notch or Head of the breast bone (cm)=145.00
Pelvic bone height (cm)=105.72
Total body height (cm)=178.00
Weight (kg)=79.50
The BMC sizing table is here:
http://www.bmc-racing.com/us-en/bikes/2 ... deore.html
Click on the geometry.
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Posts
Are you near an Evans? I bought my gf a bike from them and ordered two different sizes of the bike she was after so she could go in and try each size (they charge a deposit of £50 per bike but this is fully refundable or comes off the price if you end up buying).
Have you had any experience with these BMCs? Some people say that they seem larger than let's say a Cannondale Bad Boy or any Specialized with the same size.
My second questions is this. I want to have a comfortable setup for daily use and sometimes I have lower backache. What should I watch out for?