I'll weigh into this conversation again with my IT knowledge, and also my DAW knowledge. DAWs tend to be power hungry (CPU and RAM), and low latency is absolutely key, so as I think has been said numerous times, do not make your DAW run on a virtual system. The idea of using a virtual machine of some kind for your other stuff is still an acceptable approach, but it can be tedious to move things back and forth, and working in a VM usually means using only a subset of your available hardware, since the host system still needs to function. This isn't necessarily an issue. Also, unless running an open source operating system on the VM, you'll need to get another Windows license. I think all of this was said already.
Dual booting, in your case, I think is unnecessary, as a virtual machine for your personal stuff would probably do the trick. Dual booting, while avoiding most of the potential issues with running a VM, I don't think would be worth the effort, especially since you'd have to reboot every time you want to switch.
Now, your best option, should you really want to keep everything separate, would be to just get 2 machines. I'm not sure what your personal workload entails, but you don't need that much horsepower in a computer for basic tasks; email, word processing, internet browsing, etc. An off the shelf system with maybe the simple upgrade of a Solid State drive would tackle most generic tasks without breaking a sweat. (I buy upwards of 70 computers a year for the company I work for, and I benchmark before buying, and I can tell you that just because a machine is $3,000, it doesn't mean it will do the job 6 times better than a $500 one. Now, there are a lot more considerations here than just cost, as hardware types and configuration is important, but generally, don't think expensive is better.) Now, if you have more intensive tasks to do on the personal system (photo/video editing, gaming, etc.) then you may need a beefier system than some cheaper laptop or workstation.
Lastly, I'd like to give you my opinion as someone who has worked with computers for years, and worked with DAWs for years on all kinds of computers. I don't know how important the separation is to you, but just running everything on one installation of Windows should work just fine. I've run Pro Tools, Cubase, Ableton, and several other DAWs on many systems over the years, and I've never encountered issues, SO LONG AS you are cognizant of your hardware's limitations. I have a buddy who runs Pro Tools on a Mac that crashes every 15 minutes because he just tries to run too many plugins at once. I don't think there is a 'silver-bullet' computer out there that can handle everything you could possibly imagine to throw at it; Macs included. Using any software on a computer that has potential to eat up a lot of computer resources (CPU + RAM) should be a learning experience, in which you learn what the software is capable of doing given your hardware's limitations. Just watching the performance information in Windows Task Manager to see utilization of resources can be extremely useful. That being said, I hope you got some useful information from all of us computer geeks, and good luck with your new PC! I'd be happy to clarify anything I said that may not be clear. I'm goin to apologize if I made any typos, because life's to short to proofread forum posts.
