Dusty - naturally, Ive used ALL the bolts out. Until the cure, I used a nexus - as it was the best one I found and never broke balls in my 05 ego, or 06.
HOWEVER the one caveat is I have found - use good paint, and no bolt will cause you issues as long as your loader isnt stressing anything.
Use crap paint however ,espeically with a force feed loader, in abherrent conditions and youll see the benefit of a cure bolt.
Only with the ****TEST paint have I had an issue. All since Ive had my 07 with the cure bolt I hadnt broken any paint using white box / training stlye paint. Im sure with another bolt i woulda had an issue (like i say, its not faultless, cos with some suspect paint ive had problems) but for the most part egos will shoot GOOD paint flawlessly.
Bolts ive used:
05 v1 oring
05 v2
DART
06
NEXUS
Cure
I have no experience of other brands than Eclipse
FWIW I never liked the DART bolt either.