LS430 Tire Sizing

So I just got my wheels in and having a hard time deciding what tire sizes to go with.  Specs of wheels:

20x10 +18
20x11 +12

Thing is I don't want too much stretch, but at the same time I'll have to do a bit of fender massaging to get these to fit properly.

Do you guys think 245/35 front and 275/30 rear would be too bulky?  Trying to get the new General G-MAX tires, but the fronts are on backorder.  Thoughts?

Rear I would go 255/30 or 255/35....jmho

How much (fender) massaging do you want to do?
My setup is 19x11 et3 in the back with a 245/35.  Its a hefty stretch and still had to pull my fenders HARD.  With a 275 on an 11 with a little higher offset, I think you'll roughly be in the same situation, lots of massaging.
But it won't look too bulky

Ended up with 245/35 & 255/35

 [IMG]http://i85.photobucket.com/albums/k76/moog177/Mobile%20uploads/IMAG1270.jpg[/IMG]

 [IMG]http://i85.photobucket.com/albums/k76/moog177/Mobile%20uploads/IMAG1271.jpg[/IMG]

What tires are those?  I went with nankang ns2's and I think they run a little more narrow.

Fronts are General Exclaim UHP (had them sitting in garage from my old wheels)

Rears are General G-MAX AS-03's (Replacement to the discontinued UHP's)