[OtterBooks]

Yes they are more eye-friendly. However, the browsers are rather poor. E-ink readers are designed first and foremost to read e-books; they do it excellently, but you will likely be disappointed in any other function. You definitely do not want to mistake them for net-tablets. Even the Kindle's web browser is listed under "experimental," last I checked, which should say something.

Relatively speaking, the larger size ereaders like the Kindle DX and Sony PRS-950 may be a bit less terrible for web browsing.

Edit: As HarryT points out, the browsers may be adequate for simple, text-focused web browsing. I still would not purchase one for this purpose, especially since you stated it would be a primary one.