bad suspension would be... BC (not Buddy Club)... The environment or situation would be anywhere the vehicle is moving...
good or bad is absolute, are BC's good? no, not at all, not by a long shot, a really long shot.

why would you need to drop more than 1.5"? That's a massive drop. How does the car handle after such a massive drop?!?!?!
not only is it super danger, it will probably make your car handle like poop.

oh and I know what you mean by racing coilovers, pure overkill if you just drive to coles and back.
but they'd do such an excellent excellent job when you drive down to the shops.
and those ones you listed, you wont get the whole set for $2k. you'll get 1 corner.