@leighsean
I don't think the Diablos are being sold as singles/diy anymore (not to *anyone), due to the reverse polarity sensitivity - which is due to the red diodes used, and the amount of user error and some issues from that.
So they'll be pre-assembled, for a "small" fee, I think.
I might recommend the qb96 elite v2, though. So many options (including wattage options) with those. And for coverage, they're affordable enough to buy however many you want for your space (area and height); 4, 5, or 6 of them. Each can handle up to about 200w (with ease, I mean), though I'd suggest 100-150w.
A v3 of them is in the works but duno eta.
The wattage recommendations sound good. I don't have experience with strips, or cobs. The growlightsaustralia gear looks/sounds good.