Yes the Vipec is a very decent ecu. You should go with it. However your tuner should also be able to tune a Nistune.
The vipec cannot be compared to the Nistune because they are totally difference ecu's. You can compare a power fc and a nistune like you can compare a Vipec & Motec.
They are totally different. one does the job and works okay, the other does the job and can make you breakfast.
If you go down the vipec route, you can pull out your ebc and use the vipec to control boost for just a added $130 part so you can get the vipec for a bit cheaper and have decent boost control as well.