Monitor Audio Gold 10's or Quad 12L

I am looking for new monitors and have listened to the Monitor Audio GR10's and like them enough to settle for them. I'm using a Sugden A21a class-a amp, with Naim solid copper core wire and a Njoe Tjoeb 4000. What I liked about the GR10's is the accuracy of the middle and upper ranges - the bass is very controlled to the point of colourless.
Upon reading I have seen a lot of excellent reviews for the Quad 11 &12L's for very much the same reasons above, some have compared them to Harbeth and Proac for there accuracy and non-colouration.
In my area I can pick up both the GR10's and the Quad 12L's for roughly the same price. Does anyone have any convincing arguements to present before I check out the Quads?