I have the spektrum dx5c and have been using spektrum for around 15 years. I had the DX2, DX3.0, DX3S, DX3C and now DX5C.
I honestly don't know why asspektrum has never given me great range... back in the day when they offered only the single wire (no pigtail/non-coaxial) antenna, my range was just abysmal, 50-60 yards at best with LOS. Then 6+ or so years ago, I found DSM2 knock off receivers that were $8 a piece and they had coaxial antenna's which tripled my LOS range, just had to get them from China. Now those are more readily available. However, I found that they would crap out after about 6 months of use. I don't drive half my trucks, so it wasn't a huge deal, but then I was able to find OEM spektrum sr210 receiver which were $30 and also had coaxial antennas. I tried a couple of those, my range wasn't too bad and they seem to be lasting longer.
I thought my range was great, but that was back when I ran nitro and I rarely ran that far from myself, 100 yards at most usually as I didn't want to roll it and have to do the walk of shame to go get it. Now with brushless, you can blip the throttle a few times and get the trucks bak on their wheels usually, depending on the truck. Also, I found a public grass bmx track that is roughly 150 yards end to end and I'm finding that if my truck is around 100 yards away and down in a valley, it doesn't respond...

Still, it's better than the 50 yard LOS range I had, which was at the max distance I could drive it before.
I think if I were to buy a new radio, I'd give that new flysky noble a try. It's cool, stores far more models than I'd ever need, from what I've read/seen on youtube, the range is great and since it's software based, odds are, it could be updated as needed. Also, the receivers aren't too expensive. Still, it's a lot of radio for a basher. With the receivers at $25 a piece, they aren't too bad either. Having 10 trucks means I'd have to spend $200 on the radio with 2 receivers and another $200 on more receivers. Still not bad.
When I bought the DX5C a year or so ago, I was thinking of getting the
futaba 3PV, then I realized it stored only 10 models, which led me to the 4PM... but $270 for the radio and another $600 for receivers was too big of a pill to swallow. So, I went with the DX5C instead. It does what I want, stores 20 models and while the sr210 isn't available anymore, there is a new SR215 for $30 that will work with it.