no matter cobs or boards 500-600w for the 4x4 flower would be great.for veg 300w will do fine and clone mother tent another 175-300w
i get all my boards from horticulture lighting group.got most of my cob parts from northern grow lights except my cree chips came from pacific light concepts back when he was selling those and a few from rapidled.com
yes rapid is awesome
only thing he will be cheap on is citizen and luminous cobs
hlg direct or through amazon is still the best place to buy boards and parts for them..
im using a custom version of that,love the qb304 and qb288,bright as fuck and super easy to build with.that is a smokin deal they have right now for 850