Microsoft Surface Pro 3 with Sonar X3

The expensive one could probably run it fine.  Even storage w/ the ssd drive.  But the monitor is a bit small, esp. for touch.
 
@

jbow, that's the highest-end version. The Surface Pro's specs drop along with the RAM and HDD space when you get the cheaper models. For example, the 128GB model comes with an i5 processor, not an i7, and the 64GB model uses an i3. The 64GB version has 4GB of RAM while the 128GB and higher have 8GB of RAM. The 64GB model goes as low as $800, and the 128GB model is right around $1,000.

Personally, I would not get a Surface Pro if you're solely looking for music production. There are, IMO, better portable PCs, even touch-capable ones, that have more power in them. That aside, I originally got the Surface Pro because of its Wacom digitizer and stylus. Adobe Photoshop and Illustrator are amazing on the Surface Pro. I've found it to be a rather versatile laptop that has the bonus of being a highly capable tablet. It's great for reading books, though some might find it a bit heavy (it really is notably more heavy when compared to the ultra-light iPad, but it's not like carrying around a brick or anything), it's great for drawing, it's great for music recording, it's great for productivity on-the-go (Open Office Writer is frequently open on my Surface), and it's nice to have a tablet that isn't reduced to being a big phone by its OS.

So, yeah, the Surface Pro can be pricey, and I really think people should evaluate exactly what they plan to do with it. If it's just checking the internet and stuff, there are tablet solutions that are better and a netbook would save you a ton of money while still being work-friendly for most tasks. If the features of the Surface sound like something you'd use, then I'd highly recommend it. The stylus is far better than most of its competition, thanks to the quality of Wacom, so it already has a big plus for most digital artists.

-edit-

I forgot to add: I'm going to be doing a video review of Music Creator 6 Touch and Sonar X3 on my Surface Pro 2 in the near future. I found that there were a lot of people with questions similar to mine about how well touch capability works, how well Sonar and MC6T run, how much battery life it uses, etc. (I'd like to get my Akai MPK mini recognizable for ACT Learning before I do the video, but it might not work out)

If any of you have any questions for me, I'll gladly answer them, here, to the best of my ability and/or try to answer them when I do my video review. I'm not very well versed in MIDI, so I might mess some terminology and be ignorant of a few things, but I feel confident enough to give an initial assessment of the overall performance for recording, softsynths, and for mixing.

The biggest problem w/ the Surface is the lack there of - screen size.  Of course, that will be changing as ssd become standard and everything else but screen get smaller.  The idea would be like the sony tablets w/ their 20 inch screens (only bigger), 2 hard drives and up to spec processing.
 
Instead of waiting I got an all-in-one.  It has the cpu etc. in the base plate and a swiveling 23 inch screen.  Should work fine for live stuff although I'm still trying to integrate into the studio.  But as long as you don't want to drag it poolside it works.
 
@

Easy to add an external monitor, blue-toot mouse, and usb interface.

I haven't used it but I have purchased a 23" touch screen monitor for use with X3 (Windows 8.1).  It's not prime time yet.  The 23" monitor doesn't have the real-estate so I can't imagine a smaller screen would work out any better.  Of course I could be wrong about the surface pro!  I'm hoping the coders are looking more deeply into touch screens. 

Noel Borthwick [Cakewalk]
We have - it works great with SONAR. Depending on which config you get its quite a powerful quad core machine. I think our marketing guys will be showing it at CES if you are in the area.

well... there is no surface with a quad core processor - all the mobile cpus used are dual cores !!!