I'm using News Bento since Day one and i've managed to get 98% of my wanted subscriptions to work. There are some minor drawbacks with formatting on certain websites/articles in clean-view mode (when the feed only contains the first lines of a story, you can download the rest through the app).
I'm using NextGen Reader on both the Surface and my Windows Phone. Currently this is using Google Reader as the backend, but the developer has posted that they will continue to work after Google sunsets Google Reader. Hoping this leads to some increased competition and innovation. Google hasn't really done anything with Google Reader in a very long time now.
I have been using "readly" which is available in the Windows Store, and it works well on the SP and has a good integration with text and images and is pretty fluid. It could use a little polishing to allow you to speed through the reads, but it seems pretty stable. I imported my google reader feeds and have used it. On the SP, it definitely works better than Google Reader itself. I am used to GR on the full sized desktop which has been my go to for years, but "readly" with a little tweaking could make GR's chloroforming a so what.