I would not buy a GS without ESA.The ZF Units on the new 1250 work great.I would not spend 2 grand on manual Ohlin$$$ TTX like I did on my 2017 GSA and have the yellow triangle (ESA warning) lit up all the time...very annoying as also that Ohlins shocks are not ESA compatible...

Otherwise I probably would change to Ohlins again for being rebuildable.If I keep the bike longer than 3 years (which I doubt...

) I would get ESA-Wilbers which are ESA compatible & rebuildable;the of both worlds !
Otherwise the 2019 ESA shocks set on max/dynamic work at least as good as Ohlins TTX on my 2017 !
That's my opinion...
To order a GS without ESA...might as well get a Afreeka Twin and be booored and pray everyday to not get a flat with the tubed tires that are so 1970...

Carbs would be so much better than fuel injection too...