Here are some pics of my new Titleist Midsize Staff Bag:
Here is a side image.
From above showing club organization. In the bag:
909 D2 driver, 909 F2 15.5* & 18.5*, 909 H 21* & 24* all with Voodoo stiff shafts, AP2 710 6-PW NS Pro 970 stiff shafts, AP2 GW S300, Vokey 54.11 & 58.08, Cameron Studio Select Newport 2 34". The driver, FW & hybrid headcovers take up a lot of space. Neoprene Coverupz are a good option that take up less space and don't scream "steal me"!
AND on a 2010 Sun Mountain Micro Cart...
It fits really well. In fact, there is a padded area with a suede-like material right where the bag sits on the mounting yoke of the push cart. Unlike a stand bag the clamps hold the staff bag in placer perfectly without any twisting or shifting on the cart. The bag also fits perfectly between the wheels with no adjustment necessary of the distance between the two front wheels.
Here is another angle. As you can see, it doesn't look too big on the cart.
IMO, this is a great option.