I wouldn't recommend trying web browsing on E-ink, unless it's through some Readability filter or similar. The screen updates are too slow for it, and the DX browser didn't render perfectly. I suspect the CPUs don't have the oomph for the modern web.
Note that my experience is on a 2010 vintage DX with no WiFi - it is limited to 3G on Amazon's dime. In Europe that's only Wikipedia and the Amazon store.