Titleist Staff Bag Opinions

I have the 10.5 and have no trouble w/ either carts or transport.  I driver a 2 door coupe so trunk space is tight but I still have room for mine + 1 more bag along w/ shoes.  bag has plenty of space for all "on course" needs.  rain gear, first aid, water, jacket, valuables and whatever else I may need. 

this is my 2nd 10.5 but I have also used the 9.5 in the past which is also a good choice and would still have more room then you would/should need.  which ever you choose you will be pleased