Second that! Love him too and the incredible work he's done. I would add that I wouldn't support upping his salary or trying to compete financially to keep him.
I think there are a lot of quality options for hungry and innovative AD's that can continue the growth that has occurred here under Wren (full credit for a lot of things) at the same cost (salary, bonuses, etc).
I also think it looks good that he would be going to an ACC/Power 5 program - it increases the value of how the AD position is viewed by potential candidates, that one could go from UNT to a Power 5 AD position.
If he is an eventual finalist for the position*, I think he knows you can't bank on these things coming around all the time, strike while the iron's hot.
*I don't think he will be but being wrong here would be a pleasant surprise as it would mean that UNT is seen in the industry, amongst others and industry leaders, as having made great strides in Athletics under his leadership.