I don’t think you would go wrong with those choices. The KG-935G Plus is just a great radio. I grab that more often than not. I think the KG-UV9PX being the ham sister to the KG-UV9GX and superheterodyne is a good ham choice. I’ve been eyeing that as well. If I could help you spend your money and you clearly spend time outdoors, I’d say give a look at the KG-S88G as well. It doesn’t have all the bands others have but it’s a superheterodyne and waterproof (IP67) GMRS for when it’s wet and muddy out.
I have the Nagoya NA-771G and I feel it’s my best GMRS HT antenna, though at 15” it’s a bit unwieldy so I use the almost as good NA-701G at 5.5”. To be honest the stock antennas do seem pretty good. Just my opinion. Cheers, buying radios is fun and addictive.