Yeah the Logitech k780 is a bit bulky, but it is by far my favorite keyboard ever. It isn't a mechanical keyboard but the keys feel AWESOME (and yet are still nice and quiet unlike most mechanical keyboards) and I really like the typewriter-like circular keys.
The phone holder is amazing. I cannot live without it now lol.
Also, heck yes! I love hyping people up on the Steam Deck because even if you purchase one impulsively they are just so useful and flexible as fun handheld computers that you will find uses for it for years to come.
Do it!!!!