I've just got Zen 80/20 and really can't complain, it's been amazing, speeds always sound and ping is good, this is my ping graph: My Broadband Ping
And the all important speed test:
<a href="http://www.thinkbroadband.com/speedtest/results.html?id=141522630706683354534"><img alt="My Broadband Speed Test" src="http://www.thinkbroadband.com/speedtest/button/141522630706683354534-mini.png" /></a>
When I've got the music, I've got a place to go.
BT > Zen > Virgin Media > BT > Zen 80/20