I received my new Surface Pro 2, which I bought for the purpose of running Logos 5. After about 4 hours of running Logos, I can only say wow!
There is a slight learning curve (for me) as I adjusted from my 17 inch laptop to the smaller Surface Pro. Deciding the best layout took a little time. Getting a bit more used to the Surface Pro takes a bit of time.
But there is no compromise. Logos runs quicker and better on my Surface Pro than it ran in my i7 processor laptop, which also had 8 GB of ram. Searches are fast. Language tools work fine. And it is a joy to read from - even Personal Books.
It is not cheap, but I think it is the best way for me to run Logos. I sure the transition from a full size laptop will have a bump or two. But absolutely no regrets at this point.