Recommendation for speaker upgrade for main home listening and audio environment

Hi,
I have a pair of KEF Reference 102/2 Bookshelf Speakers hooked up to an Arcam SR250. I love this setup and it sounds amazing. I love that I can listen to music, and watch movies through the same setup, and the Arcam has been mostly great. 
I'm looking to upgrade the KEF's to something a little fuller while still preserving the quality and am a total novice.
Don't want to spend more than 1k for a pair, and definitely want a decent upgrade in sound.

Any recomendations?

Thanks