HG, you linked a 2700K Vero 29 80 CRI. Digikey sells the 90 CRI version. They will definitely grow some serious buds, may be a good choice if you are planning on running them very hard to reduce the up front cost. But as others mentioned the CXA3070 3000K 80 CRI is the most efficient and cheapest if you are planning on running relatively soft. In my mind, I wouldn't run them harder than 1.4A for a grow lamp and in that range the CXA is our best option currently. I am working on nailing down some good sources for 1.4A drivers. Meanwell makes the LPC-60-1400 for ~$20 but it is only 85% efficient and not power factor corrected. Some of the cheap Chinese 1.4A drivers are 90% efficient and are power factor corrected.
The harder you run them, the more the light is concentrated in a small area. Photosynthetic efficiency decreases as PPFD rises, so it makes sense to spread the light as evenly as possible in your canopy. Of course the harder you run them, the lower the efficiency due to current droop as well.