Stern are steel wheels and only the St comes in a 19x10 and the st6's look like they would have lots of wheel flex at cornering. If I went with 19x9.5 I would go touren tr5's. But I like the wider tires on the back so a wider rim will flatten out the tread a little more and a wider rim gives less sideways tire roll. Too wide of rim for tire and you will get less playability in tire and make a stiffer ride.
I really like the look of the touren tr5's just wish the came bigger then 19x9.5