Hi guys,
my working horse is CAKEWALK SONAR 3 Pro Edition and I really love this program. I use the Cakewalk software since years, beginning with the earlier version Cakewalk Pro Audio. I really prefer it to Cubase, because on my opinion it is more user friendly designed - that is, you needn't go through the menu jungle or to read the USER'S MANUAL any time you are in trouble to find some specific option. Every new option in CAKEWALK is normally there, where you expect it to be, and the said problem is solved just by the right click of the mouse. That's why I like Cakewalk more than Cubase, Sibelius more than Finale, SoundForge more than WaveLab.
The sound engines are great by the both of these programs - so it is more a matter of habit, and, as mentioned, the interface of Cakewalk seems to me more convinient to use.