Based on your original post I would cast my vote for the 4000TL as you shouldnt imho design your system to limit your output to the max 3.6KW.
I purchased a 4KW system last June and the various software packages predicted an annual output of around 3000KWh/pa
I have a more or less East facing roof in Cambs and my total for the year was 3600KWh -on cool sunny days peak output hits 4KW
I am sure I have gained an extra 5% at least by not limiting the output to 3.6KW
Depending on the panel spec tolerances you could in theory end up with say a 4.20KW system (some panels are up to +5% output spec)
Dont know the yingli spec but again another reason not to cap the potential of your system.
If you are south of me in the uk I would expect a well designed south facing system to outperform mine by perhaps 10-20%
So the 3600 would hold you back certainly more than the £100 difference or 1-2% inverter efficieny differences
I have a 19 panel Schuco system split 10+9 on each mppt with no shading issues.
Sunny Explorer is all you need for monitoring and there is also additional software for android and such -the sunny beam again imho is
not really needed.
Hope this helps