Choosing the right truck.

So I am officially going to make the leap from company to owner operator. I have found a solid company to lease on with thats doing 75/100 and no trailer usage fees or any small print crap. I can run my own plates (which I wanted to do anyways bc if later on down the road i make the transition to running my own authority then Ill be ready to roll). Ive seen ALOT of talk on here about choosing the right truck, but i figured Id post my question on here as well.

1. I will be hauling 53' reefer trailers (running the full spectrum of weights, but no over gross stuff)
2. I am a team operation
3. Fual mileage is important to me, but not necessarily at the top of the list.

So, here are the trucks im considering. On the high fuel mileage side, people cant seem to say enough about the volvo with the ishift, but i really dont want to drive an automatic, I had a bad experience with the ultrashift several years ago and dont want a repeat of that. Would I be defeating the purpose of driving a volvo by getting one with a 13 speed? Ive seen alot of the hype about the t700 and t680 and was wondering if there was any feedback on those models (the paccar engine seems to be getting mixed reviews) The truck at the top of my list currently is a T660 with the studio sleeper on it (with some mild mods to support a full size rv fridge and a microwave.

Some things I know i cant have.
1. It cant be over 244" (bc of canada's length restrictions)
2. I dont really want to touch anything older than an 09' (the 07-08 year trucks i have driven are just junk)

Also, is there a website to see what kind of fuel mileage different truck/engine/transmission combinations are getting. Im pretty sure the dealerships are ############ me, they are reporting over 7+ mpg on the W9 and 389 (which are great looking trucks, but ive never seen a non-modified one getting that good of fuel mileage.

 

Id rather be compliant across the board than dodging scales and whatnot.