Mechanical Keyboards

Yeah, the "easy" solution here is a Keychron V (or even C) series. At an even cheaper pricepoint, they have their "LeMokey" low-end gamer brand, but those show their budget nature a bit much in the larger cases, or so I've heard. If you don't need "officially" full size, the options (including other brands) go up by quite a bit if you can live with a 96% or its "sibling" the 1800 layout, some of which even have the full-size numpad zero. There's also just grabbing a numpad, of course, which maximizes flexibility, but I kinda like having them together; just feels right, and in a wired setup it's also cleaner. If you go full 104+ keys, I wouldn't get too worked up over software unless you like to program macros, as the point of having the full layout is to avoid the remapping that becomes so much nicer with good software like QMK/VIA. In that case, a "gamer" board like a Redragon or Royal Kludge can be okay, and their red switches aren't so much worse than Cherry's, to say nothing of hot swap being pretty common even at the low end these days. To get away from Keycrhon a bit but stay in that space, I think KPRepublic and MonsGeek both have a few decent full size boards. Cherry and Das Keyboard are still around as well.

Be careful though, the entire field is strewn with deep and interconnected rabbit holes.