For hobby use the RIGOLs are good enough, definitively.
This is not true. There are plenty of situations where the Rigols do not have the frequency capacity needed.
Sure, in this case, with the OP asking for something up to 3 GHz, it is, but I myself haven't done much measuring with a SA below 6 GHz.
For beginners I think it can be more interesting to get an older, second hand analyzer with more bandwidth because of the future capabilities. It might not have the same computer interface, but do many hobbyists use computer control?
Just to be clear, I get the Rigol and the Siglent are popular, and cost as much new as you will have to put down for a second hand model capable of more, but I don't get everyone touting them as the end-all be-all spectrum analyzer for hobbyists.