Hi nikitasius,
I replaced my Rigol DS1102Z-E with a Siglent SDS1204X-E. It is more expensive but you have to know what you want. The performances are clearly superior and above all, for me, the comfort of use.
The small defect, nothing is perfect, is that the fan is noisy compared to the Rigol.
The lesson I learned with my problems on my DS1102Z-E and with my official Rigol seller did not answer my emails, is that it is better to have the brand's official distributor not too far from home in order to bring the device there in case of problem or to have it on the phone easily.
This security certainly has a cost compared to a purchase on Amazon or others.
If you plan to buy a scope, you can get a 5% discount at Jeulin, specifying that you come from the Cyrob site (
http://www.cyrob.org/).
If you want more information send me a PM.