I've not used a fast Iwatsu scope but I did like their 60/100MHz SS-571xx offerings from the 1980s. Lovely solid scopes with nice controls and very reliable.
2465 was kind of shot by HP’s digital scopes a bit IMHO. I’d rather have a 54xxx than a 2465 as an example.
A few years ago I rescued a HP54540C 500MHz DSO from the skip at work. If it was a 2465 I'd have left it there for someone else to find
The old HP54540C isn't a very nice scope because the user interface is poor and the fan sounds like an industrial air vent. But it can behave quite well in peak detect mode when looking at modulated RF waveforms. It's generally a noisy, slow old dog but much more use than a Tek 2465 to me.
I agree, the Iwatsu scopes are really great, I have a SS5710 (50MHz 2+2 channel) and that is just a joy to use, good feel to the controls, rock steady performance and a sharp trace and is my goto scope on my bench. I have zero knowledge of Tek scopes, never had one, always seem to steer clear of them because I keep reading about them failing and always needing attention and they roll their own bits and many of which are no longer obtainable should you want one.
HP, I have a 1740A which I'm selling on, although it has a good crisp display, I'm always under the hood of it tinkering with all the interconnections between the boards to make it work properly when it decides to play up. I have a nice little Hitachi V525 (50Mhz) which has cursors and a mega zoom, again a brand not to be overlooked, good solid performer and a newly acquired Fluke 3390B combiscope (200MHz), all three scopes, Iwatsu, Hitachi and the Fluke are extremely good scopes and ones that I would not like to loose.