Any scope CRT or DSO from any era, that works and keeps working reliably is the best scope!
When they play up, or what's on the screen isn't the real deal due to wonky controls or half baked firmware/software,
you will appreciate this comment more
That said I could only afford unloved MIJ Trio and Kikusui crt dual trace oscilloscopes as Tektonix were way beyond my budget, new or used,
but when I did get on to the Tek and Phillips/Fluke scopes I realized that while they were good scopes, I didn't miss out on too much with the Japan made scopes,
which are still kicking btw and loads easier to access service and repair if the need ever arises
Comparing actual real DSO performance is a bit hit and miss compared to comparing CRTs which was/is pretty straightforward.
Any DSO I'd consider to buy would be from members and Youtubers usage reports, tests and conclusions etc,
Actually that's why I didn't roll with the Rigol 1054z 2/4 channel with shared controls
I wanted 4 obvious channels and controls side by side, with a non shared separate Trigger,
CHEAP and not too fussed with other features, bandwidth hacks and whatever, just a reasonable performing straight up four channel scope.
FWIW +YMMV: Shared controls don't work well with me, and the Rigol 1054z would have needed a parachute accessory pack had I bought it