FWIW, we have a zephyr tempest II and we're happy with it -- seems solid and well made and when it's on full it will take care of anything (anything we've tried at least). On the other hand, ours is a very different model from the ones you are looking at -- more of a traditional tented design with baffles (and 1100 cfm). I've no experience at all with the models you mention, but had heard generally good things about the company before ordering. Sorry if that's not quite specific enough.

I have no personal experience with Zephyr but I know they are owned by Nortek. The same company that owns Broan and Nutone. They whent through a quick bankruptcy to reorganize debt into equity for the banks holding the debt.

Made in China. Should be as solid as Best by Broan but with generally more unique styling.

Mine is also a different style. I've had my Zephyr Typhoon for almost 6 years and am still very happy with it. It's a bit loud on high (850 cfm) and I find that if I grill lamb burgers sometimes my smoke detector goes off, but I love how easy it is to clean.

Am I missing how to quote posts on this forum? Since I can't seem to find that option, I am responding to deeageaux's comment of Zephyr hoods being made in China. I recently spoke with Zephry asking them where their hoods are made and their hoods are manufactured in Italy, Taiwan and China depending on the model.

They are good, but too expensive, there are plenty of less expensive models out there.

Here is a link that might be useful: range hoods

I am considering a Wolf grill in my rangetop too and went to the SubZero/Wolf showroom in Atlanta (they don't sell anything - they just display and inform and demo kitchen). They stressed multiple times the importance of ventilation with the Wolf grill. She said that you have to account for a 27" deep hood for the Wolf grill or you will get lots of smoke. She also suggested 1100 cfm if you go with the grill. She says she gets calls all the time from folks who don't have the deeper hood because a KD decided it wasn't as pretty and their fire alarm goes off when they use it. Sort of scared me off to be honest!

I would be concerned that the above hood won't be sufficient from a ventilation standpoint. . .

Oh and I have read a 900 cfm hood is minimum for the Wolf grill - I think their literature even says that, maybe?

The lights on the Zephyr hood are located right in the best area for airflow, blocking the most direct path to the blower.
Corners look strange to me - if it's trying to be modern, why make the corners look old-fashioned?
And the deal-breaker for me would be the high noise level at only 715 CFM.

Also, they did not specify the stainless steel grade, so it's probably the lowest one. Typical for anything made in China...

I'm sure you can find much better out there.