I would never use those so called "good" settings, I want to be able to use my PC while it's downloading - not very likely with those settings. They will also cause problems with some routers, cm's, nat software (and STB's if you connect that way) due to the number of connections.
I limit my upload to 30k and half the connection numbers they list (I'm on an ntl 10 meg connection) and get perfectly good download speeds, while at the same time being able to use my machine.