Okay so after nearly a decade of using Logitech G15 and G19 keyboards my last G19S seems to be on its last legs and since I don't want to buy second-hand G19's for all eternity I guess it's finally time to move on

So yeah I'm in the market for mechanical keyboards now.
Since I only used rubber-dome keyboards before and I know there are a ton of different switches, the first thing I did this afternoon was to go to a big electronics-retailer and test all the mechanical boards they had on display and made some observations so maybe someone can guide me a little bit to the type of switches I seem to like?
Keyboards I liked:
Logitech G810/G910
Razer Blackwidow Chroma
Razer Ornata (although I learned this isn't a true mechanical keyboard)
Keyboards that were okay but not good:
Roccat Suora with brown switches
Keyboards I disliked:
Corsair K70 Red
Steelseries 6 GV2
That's all they had on display and I was surprised how different they all feel. What I didn't like about the K70 and the GV2 was that the keypresses felt off compared to the rubber-dome keyboards I'm used to. It felt like I didn't know when they keypress was done and actually registered and the keys offered way too little resistance.
Another criteria I've been looking at coming from the G19 are the extra features. I understand that nothing on the market seems to offer something like the G19 extra-screen that I used heavily be it for news-tickers, temperature and frequency monitoring and even watching videos on it from time to time at a glance so I know I have to part with this sadly.
Though I also used the 12x3 macro-keys on my G19 extensively from Windows to games to work usage and from what I saw only the Logitech G910 Orion Spark/Spectrum seems to offer something comparable and its full-control RGB lighting would be a nice bonus. So I'm more or less set on the G910 even though I'm not really happy with the whole package compared to what I paid for the G19 and what it offered since the G19 was essentially also a powered USB-hub which means I have to buy a external hub now anyhow. Logitech Arx Control is also a poor substitute for the old G19 screen system, not only are the software-applets very minimal in function but I also can't imagine it would be healthy for a phone to be powered with its screen on for hours on end.
The Razer ones, while nice, are shooting out of my price-range and while I never owned a Razer keyboard before I made bad experiences regarding quality with Razer mice.
What else could I look at for my needs? I'm willing to pay 130€ maximum if I really have to as that's the price a G910 goes for.
Also I know this might not be the best topic for this but does anyone maybe have an idea what's wrong with my G19S and if it's maybe just a simple fix?
The G19S comes with its own power-supply which is needed to power the backlight, screen and USB hub, without it the keyboard works in "dumb-mode". My issue is ever since a few weeks ago when I boot my PC up the keyboard's screen just flickers on and off over and over, the driver doesn't detect that the keyboard is present. It works still in dumb-mode which means all normal keyboard-keys work, anything else is a no-go though. I can eventually get it working by replugging the power-supply which wouldn't be a big deal as at the beginning one or two times was enough to get the keyboard working again. Fast forward to today I had to replug the keyboard 32! times to get it to work correctly and I can't imagine it getting better from here out on. I also tried a replacement power-supply and a different surge-protector which both made zero difference. The interesting thing is, once they keyboard does decide to work again it works 100% fine with no issues until I shut my PC down.
I also don't think it's a software or driver issue as the blinking starts the moment I turn my PC on while the EFI is still going. Warranty and such is also impossible as this G19S is a second-hand keyboard and the G19 series hasn't been in production for years.If I can fix this keyboard anyhow I would be happy as it still works great when it works but I'm also prepared to buy a new one if I have to.