We are getting one too from our granite supplier...18 guage and I think I am
going 60/40. Everything I have read about them sounds good. I guess we will
find out. Our last sink was an Elkay and still looks like new after 30 years.

Jakzof3 - I was wondering what you chose after your other thread on this subject. I even asked you on that thread to post back, but you never did. I'll link it below because the OP may find it informative.

(It irks me when someone asks a question, people give helpful advice, but the OP is never heard from again.)

Here is a link that might be useful: Jakzof3 Thread about Sinks

I purchased a custom order curved front 14 gauge copper farm style sink
from IPT Sink Company. Through the process I had a delightful time
working with the ordering woman Lei. When the sink arrived in it's well
built crate, I was impressed. Upon opening and inspecting, I discovered
that the front curve had a deep depression in it. It was not a dent, it
was a manufacturing lack of quality concern issue. When I asked the
company what to do, they mentioned that they were aware of this problem
and to fix it, I should "stick a piece of wood under it and it will be
perfect". What?! The same woman, Min, further said that the sink is a
"beautiful art" and basically said they were not responsible. So, how to
use a curved front very expensive farm sink with a deep depression
right in the front of it? I cannot sell this to my customers. I suggest
you look elsewhere, for a company that cares about quality. This company
does not deserve your hard earned funds.

I purchased a zero radius 16 gauge sink from IPT two years ago and was completely satisfied with their service. Quick delivery. The only thing that I could advise is think long and hard before buying a zero radius sink. You are talking about square corners and they are more difficult to keep clean than a slight radius at the corners. Otherwise love my sink.