2IS808

I am custom ordering some rims and i was wondering what kind of offsets im looking at when i place my order so im not guessing and end up with the wrong look for my car. I drive an 06 2nd gen IS. I am looking to buy Maya MRS anthracite rims preferred in 19x8.5 (front) and 19x10.5(rear). I was wondering what offsets do i need in order to have a flush look (a little tucked under the fender is ok). I plan to drop the car 1.5" in the front and 1" in the rear with coilovers. Havent decided on Tein SS/CS or ADVOX as of yet.
I would like to have BBK clearance as well.
Fender will be shaved. ANy help in the reguard would be great. I tried looking in the wheel owners posts on the 2is forums and havent found anyone with this setup. Thanks!