Whatver one you decide on, I would recommend a Butt set with an amplified speaker, so you don’t have to carry it on your shoulder or hold the butt set up to your ear all the time. It also helps protect your ear from acoustic shock, like when you’re checking for tone on a line with your butt set and you suddenly find it.
I like my older Harris TS22-DA with the angled bed-of-nails clips, but I don’t know if it is still available since Fluke took them over.
I think as far as butt sets go, there really is such a thing as too small and the Testo Ranger fits into that category, at least in my opinion. Extremely frustrating to work with. The caller ID diplay was kind of handy though.
One accessory I would really recommend it the MODAPT modular adapter. It has a specially designed connector that will allow it connect to any four to eight position jack for use as breakout to connect your butt set. Much more versatile than a standard Harris/Fluke Banjo.
The toner kit I use for telecom as well as everyday wire tracing is the Progressive Electronics HP77/6A and the FP200 Filter Probe. The FP200 has a switchable feature that can filter out almost all 60HZ hum. It also helps filter out the buzz of fluorescent lights and power tools. Tempo/Greenlee now makes this kit.
I’m not sure why you don’t like the 3M Scotchlock U/R connectors. They are probably best that are out there and I dare say an industry standard. These are the red-capped ones that hold three conductors. If you’re using the U/G or U/Y’s, then I could probably understand.