Thanks for all the replies.
For optimal CEM settings I'll then start the trials. Would be great to get some details on it. Read Vulgar's article about it in Mission4Today, but it was a bit generic. Would there be any others, on P51D maybe? Could be ofcourse that the level of CEM simulation in IL-2 isn't really diving too deep, don't know.
Would be great to have accuracy in CEM between the plane's real life counterparts.. Maybe in SOW

. I assume that the stall speeds are usually pretty close to real? I'll give that a try too.
I'm using TIR5 and couldn't play without one. In pacific it's relatively ok to spot planes with clear skies and water all around, but in Belgium where I'm now it's a different story. I don't want to use labels as they are a big immersion killer for me. An alternative system that would work for me atleast would be one where the game would track the vector of my sight and if it follows a bogey's flight path to a certain degree for 3 secs or so a label would fade in for a while if the plane would be closer than XXX meters.
Gotta start the online sessions as soon as I find a good full real server that allows 6DOF. I can down AI's on ace level with ok matched planes, but I assume I'll get my ass whooped like a little boy as I join the online sessions.