Plasterboard and tanking is the way to go, aquapanel is a gimmick... and if you do then Everbuild Aquaseal 7.5M kit is the best one IMO - has the best tape for corners. And, you can use the primer that the kit comes with on the rest of the walls prior to tiling.
Are you taking about the Knauf Aquapanel?
I was considering using the Green Gyproc plasterboard - moisture resistant stuff. One wall will be plastered as it is a continuation from the main wall, but the other two will be stud and paneled, tanked and tiled.
If one wall is being plastered, can (or should) standard plasterboard be used on that wall? Or should I still use the green plasterboard? Can it be plastered onto like normal plasterboard?
I'm right at that stage now and its doing my head in and the wife is on my case.... LOL
Thanks