For a little bit more you can buy a much better oscilloscope nowadays.
Sure, but:
a) 50% more isn't "a little bit" if you're on a tight budget. 50% more will buy a nice multimeter or soldering station to go with your Rigol.
b) The Siglent isn't a perfect utopia either (people seem to forget this one).
If you can get the GW-Instek at a reasonable price then it beats the Siglent in everything except sample rate,
and it has a much better/faster UI. It has separate channel controls, a separate button for menu selections (no pushing a twisty knob...). It's the one to go for after the Rigol if we're being 100% unbiased in these threads but weirdly enough it never seems to get a mention.
Prices and availability vary wildly though.
If you have only 339€+VAT, go for the DS1054Z. If you have 429€+VAT, go for the SDS1104X-E.
It's that simple!
I'll add: But if you can get a GW-Instek for $429 then grab it as fast as possible!