... I've currently got a TC Corona mini that sounds really great, a TC 3rd Dimension that seems again nice (but not a versatile due to only push button controls), a VFE Choral Reef, a great pedal that uses two different chip sets and has loads of control. Lastly I have an EHX Eddy, I think this one would probably work better on guitar as some of it's features are very hard to hear on bass, it also sounds a bit too soft for my personal tastes.
Out of the lot, even though I love analogue stuff, the TC Corona mini does indeed sound great, with the added versatility of tone prints you really can't go wrong with it (and the fact that used ones in the UK go for around £40 - £50!)