I have a bunch of old classic receivers, all need some restoration. I would appreciate your opinion on:

How difficult to work on, restore ?

Fun of operating ?

Note that i am NOT asking about how wonderful the selectivity, stability and so on, is. If i needed the state of art specs, i would acquire a machine capable of doing that.

These are hobby type radios.  I am not going to keep all of the radios named below.

SRR-13   I REALLY like the visual freq display ( that i have seen on videos )

ARR-41

SX-117  Hallicrafters

SX- 146 Hallicrafters

Also, i have some HROs:  RAS, couple HRO-5s, a German KST and a Japanse Chi Ichi.  I do not like the plug in coils that are stored separately.  
The only exception i might make is, i have a USCG R-460.

Is this an HRO-50 or the improved selectivity HRO-50-1  ?

I tend to like it, ‘cuz  “real radios have handles on front” . Honestly, that attracts me more than do a couple of the rarer HRO models named above.

Your opinion is valued.

-Hue Miller