In reply to Michael Porter:
It depends on where you are climbing mostly.
I love Totems up to red (above they are too floppy) but may be overkill if you are just climbing on grit.
For granite and limestone I don't think you can do better than Totems really. They fit in narrow gaps and because the lobes are independent, you get a really secure 'bite' on the rock (which sets them ahead of the field for non-parallel placements or lumpy granite cracks).
If you're mostly climbing on grit then I would just get C4s. They are more robust and BD will re-sling them when the slings get tired. WC won't re-sling stuff, so I wouldn't bother with them.
For smaller than 0.3 C4/Black Totem, they're all much of a muchness really. I've used Dragonflies, X4s, the new Wild Countries, and Metolius. None have really stood out as being superior. If I was getting C4s then I'd probably get the Z4s to match (and for re-slinging convenience, though if the sling on a micro was worn enough to replace I would probably replace the whole unit). Otherwise it's personal preference.