Rich both are good sets but knowing that you like to watch the F1 races I would definitely go with the LG because it has double the refresh rate. The Samsung would be fine for regular everyday TV, but I think you would get significantly better performance on quick motion things like races with the quicker refresh.
Two things to keep in mind. There is a good chance that your 10 yo rcvr s not compatible with the latest audio and video standards. This is not fatal, but more inconvenient. The recvrmay not be able to handle the latest HMDI standard, which in the worst case would mean you have to cable things to the TV and the rcvr separately and switch the inputs on each one. While that is not a big issue to either of us, at least in my house, she who must be obeyed gets very upset when she has to make selections on multiple devices to watch TV. )I solved that problem by picking up a Logitech programmable remote and moving the one button selection off of the rcvr and onto the remote, thus preserving peace and tranquility in the homestead.
) Secondly with an older rcvr you will not be able to take advantage of all of the audio options that the newer standard, like Blu-ray have to offer. You will be limited to 5.1 surround, which sounds like it will not be an issue for you (nor is it to me as i the demos I have heard at the audio shows I have never been wowed by the difference between 5.1, 7.1 and even Atmos. 5.1 works just fine for me.) And you will also be limited to the compressed DVD audio standards (Dolbly Digital and DTS) , as opposed to the multi channel hi-res audio available on Blu-Ray. the systems areall backward compatible , so with an older rcver you will still be able to get surround sound out of a Blu-ray, it will just not be as good as it could be if you were decoding the higher resolution sound that is available too you on the disc. Personally, the equipment and my audio expectations are much lower when it comes to TV sound vs my stereo rig, so I am just fine with 5.1 dvd quality sound, but YMMV. Although you very quickly get used to having 5.1 on regular TV shows and I now very quickly notice it when a show is not broadcast in surround. Even the shows on the Food Network are now broadcast in 5.1. Not saying that I think you need to upgrade the rcvr, just point out some of the downsides to not doing so.
The only thing that makes me a little nervous in your original post is where you say that you now watch 480p shows. I don't know how much 480p you watch and how important it is to you, but I have a 40' TV in my family room and the 480P stuff looks dreadful on it, and a 40" set is significantly smaller than a 60. keep in mind that when the NTSC video standard was developed in the early 50s it was done with the thought in mind that a TV screen would never exceed the whoopingly huge size of 19 inches. (remember most home TVs in those days were in the 5 - 7 inch range) So the signal itself does not contain enough information in it to support a large screen presentation of a 480p signal. Now I have seen some wonderful results come out of 4k upscalers like the ones in the two sets you are looking at, but they were starting with a full HD signal to start with and only upscaling that to 4k. I am not sure what if anything an upscaler can do with a 480p signal. This is not an issue between the sets you are looking at , but rather one with getting a 60 inch set period. If you need to watch something in 480 once in a blue moon this will not be a big deal, but if 480 programming makes up a good chunk of your day-to day viewing this is something you might want to look into further. Just a thought.