What is it about the 80?

[Geezer]

I have to point out the weight thing about the HW80 . . . On paper it's as heavy as a TX200, but when held the TX feels way heavier and the hw80 feels balanced, not once have I ever been out with the 80 and felt it too heavy, and I'm a slim guy too

I agree with you. Balance is a special thing. Unless you have to carry it in your hands for miles, a well-balanced heavy gun can be a very good thing, especially in a springer. The 80 has that, as does the 77K. Although I still prefer a well-balanced light rifle (eg Webley Longbow).