Are the wider margins better?

When I first started blogging in 2003, most folks used lower resolution settings on their monitors, and there were very few wide-screen monitors. My sense is that both of those things have changed, so at least temporarily, I've widened the white text-box for my posts (as opposed to my grey-colored sidebar on the right) to make each of the text lines 300 pixels longer than before (now 800 pixels total), at the expense of the dark blue borders on each side.

A few readers may now have to use a slider-bar to get the full text of each post on-screen, but I'm hoping this won't require them to constantly adjust it as they scroll down. And everyone will have to scroll down less frequently.

I'd be interested in readers' opinions — whether practical, technical, or aesthetic — either via email or, preferably, in comments.

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UPDATE (Thu Nov 6 @ 7:15pm): Joanna comments below that she finds the longer text lines less appealing especially for long posts. When I'm blogging — as compared to when I'm writing, say, motions and briefs for trial courts — I tend to write shorter paragraphs. But I certainly write plenty of them. So you might want to consider this question while reading a longer post, such as the post immediately before this one. And I'm also interested, of course, in how this change affects the comments. And while I'm at it, I'll solicit any other general suggestions (although I'm fairly fond of using Verdana for headings and Georgia for regular text).