I voted for the 7g. For me, it's a good combination of control, stability, and comfort. Just love the way it volleys.
I've also done short demo's of the 5g, Ki5 315, Qtour 315, Qtour, and Ki5x (though not at the same time, some years apart). I can understand why so many like the Ki5 315 - it has many nice aspects, especially considering the lighter static weight.
I noticed in yesterday's Seppi vs. Cilic AO match that Andreas appears to be using a Qtour down under.