I would get whiter bulbs and then use the Radion to blue-it-up to your liking. Blue is a strength of the Radions moreso than the whites.
I would get the 4 bulb and use some combo of Blue Plus and Coral Plus - these bulbs are well-liked by a lot of people. I would personally use Actinic and 6500k, but this can be extreme for some folks.
Here is how this usually goes...
Use LEDs alone
Happy and unsure why people say that they need supplemented (not everybody takes this step)
Added T5s to LEDs
Amazed at difference and can now see what people were talking about
Start to wonder that if just 4 T5s made this kind of difference, then how much more could be made...