...As heavily as I am into electronics, calibrating, modding, repairing, inventing, as well as ham radio for many years, I don’t need a hardware scope
for any of it.
Tim, honestly, I have a real hard time believing that you actually MEAN it...if you slowdown a bit a think again...heh heh

Seriously, I'd say, you hardly can get away without a somewhat good lab scope when doing a
lot of stuff (as listed above

).... well, you've said "heavily", so I take it as you are doing a lot of different "stuff".
A soundcard and a freeware???! - no way, man ...


Well, of course, there are ways around and "tricks" here and there for various specific situations, but , again, for someone who "heavy into it" it's just
not practical, imho....
I'd say two channel (dual trace) scope 10Hz (or up) is a must if you are into electronics/repair/mods/design.... Uhhhhhh, especially if you are "designing" circuits or experimenting .... !!!!
Well, it's what I think from where I stand. I could not live without one, actually sometimes I may feel like I could not do a thing without a scope... whenever and where ever is a question/mistery/problem - I switch it on and grab the probe -

**************
-Barrett!
Also you do not really HAVE to have a scope to just keep your deck up and running, unless you get into some trouble and need to find the problem... in which case, the scop may or may not be a help , it depends.
But if you are getting into electronics, then sooner or later you'd need one (imo), it's not just a repair/test tool, but it's also a
learning/self-educating device.
If you decide to get an oscilloscope, then I see no good reason for why not to find a good working and practical unit - so you can actually use it.
Look for a two channel 10-15MHz (or higher) unit, that is at least described as "in working condition" and has test probes and manual included (You WILL need it!) . You can find one for under 100 bucks on eBay , sometimes you can find one really cheap too, just keep looking.
I've found one example (quick search) , so something like this:
http://cgi.ebay.com/BK-Percision-15MHz-Oscilloscope-model-1432-dual-trace-/270581071110
/regards