I really like my Quantas as well. I was working on a budget so went all Quanta Pro, great bars. No dimming on the Pros and not as much PAR. They have the best spread/PAR penetration ratio out of the bars I have tried. Colors are great and I run them with kessils so I get shimmer. Very close to MH in appearance.
I believe this was Kessils 50% color and just the ReefCrest AB+ quantas on. Tank is 50x36x27" This is 3 x 36" quanta pro reefcrest front to back and 2 kessils. I Run 2 OGPop to get the PAR I want throughout so the tank is much more blue than this picture. For that reason alone, I wish I went Helix but my tank is deeper than average, and I like to keep high light stuff lowish so most would be fine with the pros.
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This is with the OGPop Pros running with above settings.
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