A good way to challenge yourself, for sure. I usually don't dabble in speedpainting, but more batchpainting myself.
What's next on your table?
Tyberos the Red Wake :-)
Here's some photos.
After this I'm debating between a Vindicare and a Callidus, or some Primaris Marines. Although I do still need to finish my Custodian Guard and my Infinity Models...