....

 

That's a very good choice in wheels, they'll look "Great" on your OB coupe. I'd go with 19X9F and 19X10R, you can use the 245s on the front but you'll need 285/35 tires for the back side. Offsets should be in the low 20s so you have a healthy lip front and back, check with your vendor. Purchase from someone local to you....
Gary

 

9/10 is weak. Go with the standard 9.5/10.5 setup at least, if not a 9.5/11. and you do not need a 285/35 on a 10 wheel. 275s are the standard for 10.5 wheels, so i don't see why you think he'd need to run 285s on a 10.

Figure out what kinda sizes/offsets/lip sizes you want from here:

 

I have volk gtf 9.5 /10.5 with 245/275 respectively. You dont need to do 285. They sit pretty good with +17 and +24 offset.

Heres a pic of my car to give you an idea. Not dropped yet.

 

245/275 is the standard setup for 9.5/10.5 wheels. but 255/285 is also common, and okay, for 9.5/10.5. if nitto made neogens in 255/285, i'd go with that hands down.