It depends on what your expectations and intended use for the rack/basket would be.

If the purpose is for drying washed pots or dishes, the basket has the 'walls' which would keep things from hitting the side of the sink. The walls will also corral any produce you might wash.

If you only want to protect the bottom of the sink from achieving that patina over time, the flat rack will suffice.

I used to have the same sink and used two of the racks. We washed in the right bowl and dried in the left bowl. I loved having those racks (bonus: they were easy to clean). You can see them peeking out in this old pic:

I vote rack. We have the rack in our new sink and i love it. The dishes still stack just as nicely, but you can actually see the sides of the sink. I think it also looks more upscale vs. a basket. Don't you just love that Heartland sink? We had it in our last house and it is so elegant.

Hope this helps!

I vote racks also. The raised rails on the grid make it easy to position dishes when you are draining them.

Thanks everyone! We love this sink and want to protect it while showing it off at the same time. Thanks for your help!