Some updates after using the Pro 3 for a few more weeks: If you are using the Pro 3 as a mobile tablet, but still do most of your real work at a desktop, then I think the i3 is more than enough. I love having it in the car for finding directions or research on the go (just like a phone but without a zoolander-sized screen). I like having it when I go out of town and need to work remotely for a few days (because it does give me full power, including VMs that I need to connect to clients and for OS-specific tools).
I think I agree with MyDouments, that if you are going to try and use the Pro 3 for a full time desktop replacement, then the i5/8gig model is probably more appropriate.
Personally, I think trying to do "real" work on any tablet-sized machine for a prolonged amount of time is going to be a painful (ergonomically) and frustratingly slow experience. It will depend on the job at hand, but be sure to take an honest look at how much time you will actually be using the device for different tasks. If you are going to be doing a lot of typing/editing/multiple windows, for long periods of time (programming? web design? even just lots of email? remote admin?), then you might want to consider something bigger (or you'll always be carrying around a second monitor and maybe a keyboard and mouse). The cost of shipping your full-sized desktop might easily be made up in the added productivity, if you're going to be working a lot.
For me, the Pro 3 is the best hardware design available on the market. Except the rear camera sucks all the way to uselessness. It is still my biggest gripe after the limited hardware configuration options and i7 performance sham. Oh, to be able to use this thing for e-deposit or scanning receipts (you can't, the camera sucks that bad)!
But would I rather have a Mac? No. I think the Mac-troll was implying that LibreOffice or OpenOffice were only available for OS X (they're not, I use them on Windows and linux), and that Apple makes more reliable products. They don't:
https
/arogatechnologies.wordpress.com/2013/07/19/the-apple-reliability-myth/