Take the easy and cheap option... go for the F180 i'd say. £20 posted or so, small enough for your pocket, big enough to take on ample size wood!
I can cut wood thats just about too thick to batton by triflex through, what more would i need! as far a s kinking go's, no problems with mine and i've caught it several times, i just do exactly what it says on the back of the box now... and let the saw do the work.
Enjoy your purchase, whatever you decide!
TBL.