You might as well learn this now: ALL servers/networks bend and break when they reach their max. Gnutella is no exception.
Thats why some speeds drop to zero one minute and bounce back up the next. It doesnt matter what your bandwidth is set on.
My bandwidth is set on max for uploads/downloads because Im on cable. Users upload from me pretty fast unless they are on dialup. I allow one download per person. No more, no less.
I find if I allow up to 3 users downloading from me it starts to bog down. One seems to work for me. The user gets their download quick and I still get to download without taking longer than I need.
Then again, Im only downloading music files.