Hi folks. I just wanted to report back that I visted
Kings Curry near Bahnhof Wiedikon for lunch the other day. I thought 28 CHF was a bit steep for a buffet so I got take away and paid 20 CHF for a generous portion, bread and dessert. I thought it was quite good - spicy! - but only reasonable value. Anyways, Kings Curry is recommended.
In my research, I also happened upon
this thread over at Travel Advisor asking the very same question! Lots of good suggestions there as well.
Cheers and enjoy.