LED advice for 20" cube, currently 250w MH

[nerdz]

Hi

Need advice, would this be okay:

3 channels

Driver 1: 12 x XT-E royal blue + 2 XP-E blue
Driver 2: 8 x XM-L Neutral White
Driver 3: 6 x UV + 2 deep red

80 degree optics?

My head is spinning! I saw some combos and layouts on a nano-reef thread, but nothing for a 20" cube...

Whole build should be ~$300. I'm not against manufactured fixture, but not sure. Kessil 350 is nice, but no sunrise/controlling options. AI SOL is nice but not much colour option. bah!??!

Thanks for any advice!