I've always like PINE and direct access to my UNIX 
acct through telnet - like aion says, no wait, 
etc. But I like saving my messages, which means my 
mail needs to get to my HDD (especially important 
to save receipts, for instance). Gotta love 
Pegasus. ^_^ Talk about extreme power and 
customization ... The advantage of an external POP 
client is that there's no lag time while typing 
like what happens through telnet/PINE to the 
server. Annoying.