This is just my opinion now. If you have plenty of room split up the spectrums 6500K/5000K is awesome for veg and a 3K for flower will rock the house. BUT- I prefer for my gear to be diverse you never know what you will need to do trust me, so depending on brand I would go 3500K/4K for veg and flower. More versatility and still get good results.
Just my $0.02