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Telrad is a funny beast: you either like it or you don't.
I sit in the "don't" camp. It is an effective finder, I acknowledge that, just not the right instrument for me.
I'm happier with a simple red dot finder. I can use both eyes very comfortably with it.
Most of my 'finding' is done with an rdf. But there are times that the optical aid that magnifying finder provides is preferable. These overcome the effects of light pollution, showing fainter stars than we can see naked eye.
My big dob has an rdf & 2 optical finders on it. The rdf is always the first port of call, the optical ones may or may not be called upon, but they are there when needed. My other scopes all have a dovetail mounting block onto which I can use either rdf or optical finder. Just depends on what I'm chasing & from where. The dovetail block allows for a quick & easy change.
A 30mm finder is good, but don't think that you'd be over doing it with a 50mm one. A right angle correct image 8X50 will be very effective on your 130 scope. I use one on my 114 scope too. Particularly from home, a 50mm finder offers much needed aperture grunt to find your way around. Andrews has them for $79 - more than the finders you mention, but it's got more guts.
Food for thought.
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