Question for Lease 0/0 with Prostar trucks

I am in a 2007 Columbia right now as a lease O/O. I am seriously contemplating turning it in for a 2013 or 2014 Prostar, and am curious if there are any lease O/O out there that are driving one of these and how it is working out for you.
Thanks in advance.

 

Have heard stories about maxforce, especially in the early models. But as an O/O the 7 year unlimited mile warranty on that engine sure sounds nice.

 

This Columbia is killing me in maint, especially the APU. It is almost impossible to keep it running for more than 3 weeks before it is back in maint.
Also, with the new emissions standards coming out next year in California all 2007 and older model trucks will not be allowed to enter the state. And I am sure other states such as NY and PENNSYLVANIA will be sure to follow soon after. So I can see the future writing on the wall by keeping an 07 model that will have very limited areas that I can drive it.

 

The numbers I have crunched come out about the same. Lower payment/lower mpg/higher maint costs -VS- higher payments/better mpg/lower maint cost.
I know several O/O with Columbias like mine, just anxious to hear from some O/O that have prostars and see if their numbers add up to the ones I am making now.

 

I have to cover all those expenses now when my current truck is in the shop, as well as pay the cost of the maint. Atleast with a warranty I wont have the cost of the maint any longer.
However, I am looking at the cummins versions as well. I may actually prefer it.