* C'est une excellente nouvelle! (This is excellent news!) - This is a very common and straightforward way to express excitement about good news.
* C'est une nouvelle formidable! (This is wonderful news!) - This option adds a bit more emphasis on the positive and wonderful nature of the news.
* C'est super! (This is great!) - This is a more informal and casual way to express excitement.
* C'est fantastique! (This is fantastic!) - This is a very enthusiastic way to express your happiness about the news.
The best option for you will depend on the context and your level of formality.