However, they are gaming machines and have pretty strong GPUs. They are also heavier -- 2.8kg and above. Finally, they're very expensive. They might not be what you're looking for.
But, I am still on the lookout -- just like you.
Even without the water spills, the quality of the keycaps and the feel when typing gradually worsened after the first 11-12 months of usage. I am not opposed to paying $200 for a keyboard but I expect more durability for my money.
Ended up replacing it for ~$70 Chinese mechanical backlit waterproof keyboard that has been, and still is, the best keyboard I've ever used.
The Deathadder Chroma mouse is nice though. I used cheaper mice that I liked more both in visuals and performance but the mouse is passable. I don't think it should be that expensive for its quality but it serves me just fine for 15 months now and hasn't degraded in any way.
There are many good keyboards and mice out there -- waterproof & mechanical & backlit / waterproof & with precise sensors & backlit -- which cost less than Razer's and are more durable and with better quality overall.
It's very natural to compare products of different brands and quality and build expectations on what features one can expect for the $N price.
And for the keyboard I have no idea what failed on them. Owned three over the years, all just stopped working at one point in their life.
My issues start when the supposed top quality is surpassed by easy-to-find Chinese products on Amazon costing 40% of Razer's price. And when I say "surpassed", I mean it in literally every way. The keyboard I now use has better switches, is extremely realiable, her anti-ghosting capabilities are predictable and never failed, it survived spills of water, sugary drinks and hot drinks without ever missing a keystroke, and is still going strong after almost a year without any signs of wear and tear. Hell it didn't even get a scratch when I dropped a knife and fork on it!
I appreciate the DIY advice, thank you. I feel all of us have to become DIY experts over time because when OEMs see fit to push planned obsolence even in products like a keyboard and a mouse, we have to respond in kind -- repair your stuff and refuse the give money when the OEM tells you to.
If you search for "waterproof backlit mechanical keyboard", you will get a bunch of these (probably 20-30). Haven't looked in the US Amazon.