Hey mate, I didn't realise that you had gone through so many!! I remember two of them going but jeez, that's a long list!!
I can only tell you about what I have experienced. The Nosram stuff I have raced week in week out has been perfect apart from one mysterious incident where one of the speedos just decide to stop working. I rang Mirage and had a brand new sealed in box matrix Evo '07 on the doorstep within 48hrs. I can't comment on the Novak stuff as I have never owned one but I do know that I needed a new ESC this week and I just bought another Nosram.
I hope you get this sorted dude, we need to see you back racing!