I wish that people would state their wheel widths when they say I have +xx offset on the front and +xx on the rear since offsets change depending upon the width of the wheel.
BTW, on a 19x9.5 wheel you can run either the +30 or even the +25 with a 265/30/19 IF
you are willing to roll your rear fenders. I think its a good trade off since rolling them will only take you an hour or so if you take your time and you will have a better looking wheel (ie. more lip) and you won't need a ridiculously sized spacer on a new set of wheels that should fit right from the start.
I'm running a 19x10 +35, which is very close to, if not slightly more aggressive, than a 19x9.5 +25 with a 265 and its dropped pretty low with no rubbing.
Also, I have 19x8.5 +40 in the front and if you like a flush look then you will need to run a spacer since it sits in the fender slightly.