I wouldn't buy a Mac to run Sonar via bootcamp. I would just use a Windows machine and enjoy some of the things Windows does good like graphics intensive games.
But my experience so far, about a year and a half, with a Macbook Pro has been great and I would miss a lot about OS X and Apple if I had to go back to Windows only.
For me OS X seems much more complete and polished compared to Windows and it has worked out great (not perfect but really good).
With Windows it seemed like I always had to walk on egg shells with audio, and to a certain extent video, and well pretty much all hardware. ASIO vs WDM vs whatever the default windows audio driver is being used, and internal sound card conflicting with external audio interface, and Windows programs conflicting with each other when using them at the same time as using your audio interface and audio program etc. The default monitor changing because you plunged in the video monitors differently this time and nothing displaying because the monitor isn't compatible with the resolution/frequency and Windows can't figure it out etc.
On the Mac I have zero fears running what ever I want all at the same time with what ever configuration hardware audio/video device I'm currently using. In fact, I have no idea what driver mode it uses and could care less. Hot swapping monitors day in day out with out a glitch. Logic, Audition or whatever works just as good weather I'm using RME Fireface 800, Edirol FA-66, Belkin Thunderbolt dock or the laptops internal sound. Latency? Seems fine with all the above. What did I do to configure the machine. Nothing.
And all the little things seem a little more complete and polished in OS X. There's not much I need in 3rd party apps. Silly little things, like taking screen shots, recording the screen, FontBook to see what fonts are installed, screen sharing (getting Windows Messenger remote assistance was a crap shoot at best), backup built in etc. Plus it integrates with iOS well. And security software, what's that? Been a year and a half and I haven't thought about security software once, or had to deal with it scanning all the time, finding fake crap etc. (Though, in Windows defense, MSE was pretty unobtrusive. Also updates, it's a one stop shop that pretty much runs itself. No more having to go to NVidea site or Mobo site etc searching for an update to hopefully fix some issue, trying to find the correct update etc. A BIOs, What's a Bio's? And who cares?
I always hear people say how much more Macs cost being built with standard cheap hardware. I'm not so sure. A lot of the cost was the retina display and pci-express SSD drive. The display has been tremendous for video editing, zero calibration. The SSD hums along over 700 MB/s. Thunderbolt 2 has worked out great with all hardware including both my firewire audio interfaces.
I have no problem with Windows really and I think Windows 10 is going to be nice
But marvinglenn2 asked so I thought I'd share my first experience with a Mac.
I'm probably just as tired of hearing about Apple and the "i" this and "i" that as anyone. But my experience has been pretty smooth. Logic, Final Cut and Motion have worked out good for me. Fingers crossed. Apple does seem to be moving really fast with stuff and I could see it leading to problems. Hopefully not.
And as far as a learning curve goes, it did take a little getting used to the differences. But they are minor and it became second nature pretty quick.
Oh, and did I mention that Logic works 100% with my control surface CM Labs MotorMix. I pointed out to Cakewalk the problems with the control surface and Sonar after I upgraded to Sonar 7 back in the day. They confirmed the problems. Never fixed.