"Rhys had a taste of (Super Rugby) last year and Nathan is going to get an early taste this year. We are in for two very special careers I hope."
Smith is confident heading down to Christchurch, where he first made his name as a quality coach, after last week's final pre-season game against the Blues in Rotorua.
He particularly liked the accuracy and the level of intensity.
"It was more Chiefs-like. I thought we were well off the pace over in Queensland so to turn that around in a week was good. The first 30 minutes I thought we were accurate and strong in defence, so that was a good sign.
"The other encouraging thing was how the young guys came on in the second half, (including Bay of Plenty's Harris, Carl Axtens and Elijah Nicholas), and they didn't fall apart.
"They held out until the last seven minutes from the end when the Blues scored, so that was great for those guys who are not all part of our squad."