...I am a casual listener and like to know what is going on in my community...
...I recently read about the Radtel here at RR. Though I recognize all the downsides, I’m considering getting one. It is inexpensive. I can listen to marine channels, local UHF/VHF public safety, and when my grandkids are on the boat. They can listen to pilots on approach to Logan...
...I am considering using ham radios as a public safety receiver...
I'd say you're ahead of a lot of people because you understand the difference between a scanner and a receiver, and what each can do for you. A lot of folks get disappointed by not understanding those differences and uses.
I have Radtel 860, 880, and 950 models, and they're excellent as receivers. Being able to monitor 3 V/U channels (2 for the 860)
and an HF frequency simultaneously for less than Franklin's portrait is a big draw for these HTs.
Aside from the AM modulator and airband transmit, it looks like the primary difference between the 1000 and the 950 is the return to separate antennas for the transceiver and receiver sections. I prefer the dual setup for monitoring to the single SMA jack of the 950. It's just much easier to use separate antennas for HF and V/U than switching or using a compromise.
On HF reception, the 860 and 880 are very good performers with active loop antennas, and good with passive antennas. The 950 has a better gain section than the others, and does nicely on HF with telescopic antennas. The bandwidth is not adjustable on HF, so adjacent channel interference can be a problem. Frequency accuracy and stability is very good, usually needing no BFO adjustment on SSB for modern transmitters (HFGCS, USCG, new ham stuff).
I'd assume that the 1000 will have the two operating modes of the previous models. The names of the modes seem to change from model to model, but the results are the same. One mode allows the transceiver to transmit on the VFOs and simultaneously monitor HF on the receiver section. The other mode, usually called something like "wide-band receiver mode", cuts off transmit and give you some more flexibility in VFO assignment, but takes away the simultaneous HF listening.
If your grandkids like listening to aircraft, they'll enjoy one of the Radtels. They do very well in civil and military airbands, plus they can listen to the overseas flights on HF.
As to which model I would recommend for you, that would depend on your antenna situation, and what you want to/are willing to set up. For the 950, a VHF antenna will kinda work OK on strong HF signals, and vice versa. There are some active loop antennas that do fairly well at covering both, but it's still a compromise. I like using the dual antennas of the 860 and 880 at home or or the car, but it can be ungainly in handheld/on-the-radio use.
If you just want to use it as a handheld, I'd recommend the 950 and the Radtel tri-band antenna RHD-771S. It works well for scanner frequencies and does a pretty decent job hearing HF. The little loop antennas that go on them seem like a novelty; the 771 or a telescopic whip do better for me on HF.
For the usage you've described, I think you be happy with either the 950 or the 1000, just decide what you want/need about the antenna selection and choose the appropriate model. Enjoy!