The money you save on the rims, you will have spent and much more when you realize too late that 17" tires wear out QUICK when driven hard.
ANY tire will where out QUICK when driven hard. Get a proper alignment for the way the car is going to be driven. Also, if you drive like a granny, the tires will last a good long time. if you drive spiritedly or race, well, expect tire life to be shortened.
What do you think of this: What if I get spacers with the center hole that fits over the front rotor hub that doesn't have a hub ridge to interfere with the Ford rims?
Those are the ONLY spacers you can run in the front because the Mopar register is LARGER than the Ford one. I run a set of 4 on my Challenger. Your disc hub is still much longer than the spacer so you'll have to figure decide on whether to turn "what sticks out" or modify the wheels. My spacers ran $105 for the set (w/ shipping) 2 years ago.
as for bearing loads, anytime you go to a larger contact patch on the front you're increasing the loads on the system. Also, as the wheel/tire gets bigger/heavier, you're increasing forces on the bearings, brakes etc. You have to look at the wheel/tire as its own rotational system. 14x5.5" rims sporting 205/70s is a lot easier on the car than 15x7s with 245/60s. And if you get lightweight 17" rims and 245/45s you may find that there's less forces than those 245/60s. My Konigs and 245/45s are extremely light compared to 235/60s on 15x7 rallyes (which they replaced), and definitely lighter than the SVT rims and 275s.
btw: my 2 sets of 17" wheels and tires:
Spacers $105
Konig 17x8s $250
Yokohama 245/45s $400 (new)
SVT 17x9s $300
Used Race Rubber $150
Mounting/Balancing (both) $200
Modify discs $0 (expect a shop to charge around $60 for this)
So I'm out $1405 total for two sets wheels and tires. I kind of got boned on mounting balancing, and I only needed to modify my discs for the FORD wheels.