Shocks me to see Logitech has the upper echelon of the market for you all. Had no clue.
I have a bottom of the barrel K series Logi wireless mouse/key. Nothing fancy at all. Doesn't feel ergonomically wonderful. I have to bang the crumbs out of the keyboard every couple weeks. Does what $40 USD (for the combo) needs it to do. Nothing magical.
If you are into the whole brick and mortar experience like I am, it's the monopoly mouse; the people's mouse I guess.
That's a generational difference. In no brick and mortar store in the usa will you see the high-end logitech mice and keys you all refer to. Just the low end like mine. My experience anyway. Interesting thread.
Still makes me wonder: where is their competition?