To Devialet or not to Devialet

[Womaz]

i guess here are a few of the things going through my mind. Like everything in the upgrade journey you have some spare cash and that spare cash suddenly is not enough.

I am close to having the funds for the 120, the 200 would be another few months. are there any other costs I would have to bear in mind?

Is it worth the extra 2k?
The SAM technology - is this just available on the 200 model up.
I currently use a headphone amp in my system, do both the 120 and 200 have a headphone amp in them. Are they any good or would i be better off keeping mt separate amp? One of the appeals of the Devialet is the simple replacing of boxes. So I would prefer Devialet and Streamer and thats it.

I have read the two specs but that doesnt really help me. I say I like the power of my amp but its not all about 120w or 200w.

Any guidance much appreciated