I would look at Kobe ($920 approx) and Elica (they have several $1150 and up)

Just out of curiosity, does anyone know if the

glass is hard to clean?

glass is less efficient (due to flattish shape) in collecting the fumes and oil)?

depth makes a difference in glass?

We are looking at hoods with a new slide in, and would not consider anything less than 24 inch deep due to our cooking. I have seen far too many hoods have fumes roll up in front of them, especially the combo microwave ones.

A flat rangehood will definitely not exhaust as well as one with a good deep basin -- best about 5 inches deep. And of course the front to back depth of the unit should be about the same as the cooktop so it can draw from the cooking on the front burners. Many units come to only about half-way above the front burners, where most of the really heavy cooking and splattering happens. The distance between the unit and the cooktop should be what the manufacturer recommends. I think these features are just as important to get right as is the cfm rating. In fact you could probably get away with a slightly lower cfm capacity if all those other characteristics are optimal.