Cylcowiz is good
-Good Upgrade support
-An active forum
-Support opensource firmares(Only modified firmware for Cyclo is wiifree atm)
-Never had problems with it my self all games tried worked no slowdowns
-All my DVD's i had in house worked which where(Sony - r and Philips +r)
-Upgrade chip, Nintendo never can overwrite it!, unlike other chips Nintendo can just make a fake update for such chip and overwrite it blank
EDIT:
Seems someone is porting a Yaosm Port for CycloWiz
He did release a beta and it only have some bugs
Here it is,
http://www.teamcyclops.com/forum/showthread.php?t=1545
But i would use it yet as there is only one beta tester which is reporting after config disk it can't play backups
So it's not recommend to use it yet
But just want to let you know there is work in process for other firmware