Ask TGN: Choosing a brand of acrylic paints

Reader Patrice asks:
I’m in the process of buying myself a complete set of new acrylics paints. I started long ago with GW paints and achieved some good results with them. I then switched to oils (Winsor & Newton) and achieved even better results with those but the problem is that they take a long time to dry and you have to be very patient.
So I want to, in parallel of my oil painting, start again using acrylics. I’m hesitating between the Vallejo and the P3 range from Privateer Press? What would be the guidelines to choose between one or the other?