I love making cupcakes, but usually just stick to either Vanilla or Chocolate cake and then use various flavoured butter creams. I'd like to use flvoured cakes as a base, along with flavoured icings this time, but need ideas and well tested good recipes since I will be passing these out to co-workers and friends.

So far I'm thinking:

Spice cake with vanilla icing
Apple spice cake with some sort of caramel / brown sugar icing
Pumpkin spice cake with cream cheese icing

I've also thought about using a cinnamon butter cream on the above cakes flavours. What are your thoughts on these? Does anyone have any good recipes that they have tried and really loved??