i heard alot of good stuff about mac
Yeah, and I've heard a lot of bad stuff as well.
In all honesty, there is very little difference between the 2 platforms these days - there are no major bugs or showstoppers in either OS, but please don't think Macs are problem free - just have a look at their forums if you want confirmation.
But hopefully Sonar will stay as Windows only. I for one would not want Cakewalk to divert resources away from this model they're developing in order to satisfy what would be a small minority of users.