Why don't you call Wolf's customer service line and they can tell you what size the stove requires. They have answered many questions for me.

there are so many variants with noise levels - How it is ducted, construction of your home (plaster is quieter than sheetrok) etc.... The same vent in another persons home will sound different

That said - you are on the right path for getting good ventilation - I'd rather have a little noise for short period than have lingering smells and grease build up on my cabs/walls/fabrics
Best thing to do is find an appliance dealer that has this vent hooked up & go see/hear it on site, knowing it will sound a bit different in your application.

I have a Zephyr - many speeds - yes it's noisy @ high speed, but I only use that for short bursts

Good luck

If you do not have a grill on your stove you should not need that many CFM. Take a look at the fantech web site. I have the FKD 10XL and it is remarkably quiet even at high speed but it does have a silencer/muffler.

Here is a link that might be useful: fantech

You are on the right path for quiet with an external blower. If you have the room, add a fantech silencer. I would also recommend a hood with baffles in lieu of mesh based on our experiences. You can find quite a bit of information in the appliance forum

You're also on the right track with a powerful & wider hood in an island application. There is a greater possibility of grease/steam/smoke/heat drift with an island-installed (or peninsula) range than one installed against a wall.

Definitely look into an external blower, it will help with the noise. But, accept the fact that a fan is a fan, if it's soundless it probably isn't doing its job!