clients that I prefer:

Gnucleus... (this one allows you to really see what is going on behind the scenes which is important if you want to tweak your horizon)

Xolox... this has multiple host downloading...

of all the thing you requested:

"support chat, list browsing, or hot-lists (even for static IPs)"

I don't know of any client that have these.... so you'll still have to resort to other ways of finding new music... if you want to look at other P2P networks go here:

http://www.zeropaid.com/

it's got a nice list... you might find something with what you want... have you tried Kazaa (aka Fasttrack)... it's a pretty good network too...