ports: stable or current?

[schrodinger]

If you're using OpenBSD stable branch is it "dangerous" or can it cause problems using current ports instead of a stable ports tree?

i.e.:

src tree is

cvs -qd anoncvs@anoncvs.ca.openbsd.org:/cvs get -rOPENBSD_4_3 -P src

So for ports should I stick with -rOPENBSD_4_3 or can I just go ahead with

cvs -qd anoncvs@anoncvs.ca.openbsd.org:/cvs get -P ports

*Note going to be starting from a fresh install - I'm not going to be mixing old trees or packages here.