Sonar--never heard of it, but Linux does have several audio editing tools. My son uses one called MixCraft that he seems to like a lot.
Winamp--no problem. Several apps look and feel just like it., though there are better ones out there.
PhotoShop--Now it's getting into the heavy hitters. The closest (which probably isn't good enough for you) is GIMP
Video editing--there are several good ones. I don't do video editing, so I'm not aware of the titles off th etop of my head, though I have seen quite a few articles about this genre of software.
DVD burning--piece of cake. I can rip/burn DVDs, download video (and extract the audio) from youtube, etc.
Games? I ton. Steam just announced they've hit the 500 game mark for Steam Linux. This morning, I saw that Civ V was announced as a native port to Linux.
I don’t consider WINE an alternative.
I used to have a dual boot machine when I used OS2 Warp. I also used to have a Beta VCR (both far superior to the compettion, btw.)
Never again. My computer is now a commodity, not an occupation. It is a tool that I use like a car. I don’t want to have to be a mechanic any more just to use it.
And FWIW, I’m in IT and had to become a dos memory management expert to get Aces over the Pacific to work in DOS mode on my Windows 3.1 machine back in the early 90’s.
I also tried Ubunto several years ago.
I’m done with that nonsense.