Wheel and tire combo????

I am getting some new wheels and tires on my 99 z71 and i know what wheel i want to go with but im not sure what look i want. So let me know what you guys think and what combo you think would look better.

Here is the wheel but the ones i want are power coated black and have a silver/machined lip.

http://www.wheelsbymbmotoring.com/viewWheel.php?brand=Off%A0Road&wName=Gunner6AM&finish=Anthracite%A0/%A0Machined&pName=Gunner%A06



iI eather want to go with a 16X8 wheel that will be off set so they will stick out a little, with a 305 70r16 Nitto Terra Grappler

or....

I will go with a 20X8.5 wheel that will have the same offset as stock but will have a goodyear all season tire.

soo... let me know what ya think.
Thanks

just something to think about when buying rims...

Aftermarket aluminum rims that have a milled finish are not clear coated, they look real good new but are about impossible to keep clean and water spot free. They look good from a distance but after a while when you look close they look dull and water spotted. You might look at some aluminum rim that have a crome finish. To clean them you can windex and wipe with a soft cloth and they look good as new. No rust either because of the aluminum rim instead of crome plated steel. Just my 2 cents.

Ya , these wheels are powder coated black and the lip is clear coated.