one of your best guides for how much cfm you need is how much you have now and how satisfactory it is. With your new stove, once the new wears off, you might be cooking a little more than you do now but chances are not much more. if your current hood is adequate or almost adequate then I would get one a little bigger. Regardles of what your stove is rated for, you only need venting for the amount of cooking you are actualy doing. How often are you going to have 6 burners going on high at the same time?
I had a cheap builders hood for years, maybe 150 cfm at most. Seemed to be adequate most of the time, although very noisy on high. I replaced it with a 400 cfm Fantech external blower. We never run it on high, about half speed ocasionaly, and usualy on low.
The new hood is a GE Monogram under cabinet 36". The full hood area is filter. I took the internal blower out and trashed it, modified the outlet from 7" to 8" added a fantech backdraft. I made a homemade silencer because I only have about an 8' run to the outlet.
This is very quiet, and more capacity than i will ever use.
Almost any hood can be easily modified to work with an external blower. This will usualy be quieter. Also easier to service or replace if it ever breaks.
Q
Organization system - will it fit Ikea
Q