whether or not you go with a staggered setup front and rear its up to you. I would go with 19x8.5 front and 19x9.5 rear
In regard to tires, I would go with 235/35/19 front and a 275/30/19 rear. Alot of people have gone with 245/35 front but I don't like the fact that it is taller than the rear tire. Not by much but it still is.
I think that a 225 tire on an 8.5 in rim is going to be a bit small and it will look kinda stretched. its also going to be larger than your stock wheel/tire combo.
If you want to go with the same setup all around you could go with the 19x8.5 and run the 245/35 tire. It will be roughly the same size as the oem but will work just fine.
I don't know about your offset choices but your front could be as low as probably +35 and still be safe. The rear would have to be about a +44ish or more to give you the ability to not have to roll your fenders.
use that link to play with different tire sizes to find what will work for you