Like most touring car's 40 shore all round (front and back) would be right to start with.
If you want 'balance' you probably will always run front and back in the same shore (actually, rear tyres are always a little softer)
So, start of with 40 shore, if you want more steering then 37 shore front could work right, but be ware that the car can be unbalanced then..
If you think 40 shore is to hard, just go to 37 shore all round, the tyre wear will increase ($$$), if that's not enough go to 35 shore, but that would be special
There are also some racers that use 37 shore rear, and 40 shore front, it depends on what you like... so my advice, start with 40 shore all-round...