When Lee Valley introduced their matched irons and breakers, I bought a set for my 604, 605, and 607 planes.
I used the 607 today on a 2X6 piece of birds eye maple. I'm not sure if I've used the plane since the conversion.

I did today, and I was blown away by the quality and ease of the cut. Translucent full width shavings made the experience enjoyable.
The plane felt like a custom really high quality plane.

I've used the 604 and 605 with pretty much the same reaction. I highly recommend the Veritas irons and breakers.

Just thought you would like to know.