I just like to keep it simple. I hear the bugs have been worked out of the BR600, but I also hear that Stihl is doing away with their 4-mix trimmers and going to a strato engine.
The BR6 is badass. I know some find bugs with them but I use one ever summer where it gets the complete and utter chit beat out of it. Badly.
And it's still kikkin' a$$ each and every time it gets used. Fires up on the 2nd pull no questions asked. And when I say this thing is beat, I mean it is BEAT!!
You'd be nuts not to get one but that's just my opinion!!