I'm a big fan of Zoom stuff, too. I've had a few multi-FX devices as well as a portable recorder (H1) and the fantastic Zoom R16. I've never been less than impressed.
My FX needs are pretty minimal, so my old school B3 is perfect for me- especially as I modded it to use with an external patch changer pedal. I had a Zoom B1 Four and it sounded great, but for live work, where I have to switch between patches, I prefer the B3.