Thanks for all the replies!
That offset calculator is quite convenient and has been added to my car toolbox
If I do the full package I'll be running with this configuration then.
FRONT: 19x8 245/35-19 OFFSET 35
REAR: 19x9.5 275/30-19 OFFSET 41
(I like the tire widths JTS)
If no one yells stop I'll probably order them at the end of the month.
maybe pics to follow