I've tried ginger beer once (not Bundaberg), and was not a fan of it at all, so I wouldn't bother with that one. I don't know what sarsparilla tastes like, but I kinda assumed it was along the same lines.
I've had other pink grapefruit drinks and liked those. I also like pineapple, not sure about the coconut bit.
It was probably a while ago now but Coles had a six pack of the fruitier flavours for a limited edition run, that's how I got into them because I never wanted to buy a four pack of something I'd never had before. But I liked five of the six in that so I took the risk with the remaining flavours.
Ooh, I'll have to look out for that. That sounds perfect.