Oscilloscope MHz recomend

[NavMicroSystems]

I think there is not much to add.

A good dual channel 20MHz scope would be good to start with.

I got my first one (including two good probes)
second hand at $100,
(a great bargain)
and it is still doing a good job.

Check ebay,
there are many HAMEGs (and others)
in the $150-$250 range

As Luciano has already mentioned,
is is a matter of what you can afford to spend.

My second scope is a Fluke 123 which I really like.

But to be honest, more than 90% of the time I use the "old" 20MHz analog scope
as it has a fixed place on my bench.