I will be running mine with the 8's at the front and the 7's at rear. At the end of the day the car is front wheel driven so it makes sense to put the wider wheels there.
With a bit more manipulation I think that I could fit the 8's on the rear but I really don't fancy running stretched tyres or excessive amounts of negative camber.
Using a wheel offset
calculator it seems that compared to my 8j et 33 your 8.5j et 37 rims will extend an extra 2mm past the outside edge of the wheel and your inner clearance between the inside of the wheel to the strut housing will be 10mm less.
At the end of the day I think the only way to tell for sure and be happy will be to test fit (even without tyres). Hope this helps and let us know the outcome.