DarkNote is always well ahead of the all CN-coin.
I'd say XDN, XMR, and BBR are tied for first place depending on which features are important to you.
XMR is best for those of us who don't GAS about GUI and want security from Timewarp, etc. attacks.
BBR's light footprint is very nice if you are on Granny's old laptop.XDN is the only game in town if you like anon msg and a GUI.
BBR's light footprint is nice regardless of what hardware you're using.
BBR has had a GUI for a long time.