Well I finally realized that despite my intention to stay with it and increase the difficulty of the moves that I have reached a plato in my progress.
Ballistic moves, most notably the swing, are not effective anymore and what is even more important, since I am not challenged by the weight, my technique has suffered severely. I have lost my form.
After doing 150 2H swings, 150 mountain climbers and 20 clean presses (10 on each side), I decided to tried the Turkish Get Up with 24 kg dumbbells and 2H swings with both 24 kg and 32 kg. Tough job, especially the TGU.
Hence I decided to get myself both the 24 kg and the 32 kg, for strength moves and ballistic moves in that order 🙂