you can use the same hubs, if you choose rims with same amount of holes
You will need new spokes probably if you are going to choose a different rim, if the size is different
But why would you?
If they are light and they work for you and dont break, I see no reason to change them :/
Personally I found that I get better if I spend time more about riding than spend money on the bike. And after I get better I tend to not change, just set something, or change a different part that helps my riding