Tornado SF2 Delta

I just wana compare the CFM and the DBA...
Which one of them is better overall with their CFM and DBA? 80x80 all of them
I know that tornado has the highest DBA and the highest CFM but is it worth getting it with the highest CFM but a high DBA?

I'm using a YS-Tech variable speed (10-48.5cfm) fan on my SLK-800 and I can say that it isn't all that bad. I also have 4 fan's and a blower in my case and all in all, it's ok.
The tornado is more powerful, but I don't have my fan at full speed and I have max temp's at 31*c. Maybe the tornado is overkill?
It's all up to your ear.