You can get the X-Notes for $35 ($5 less) at 5thD-X (you can't see, but it's the same thing, or at least, that's the very notebook they sent me when I ordered):
http://5thdx.purehost.com/store/index.php?main_page=product_info&cPath=10_7_47&products_id=68
I bought these, and like them a lot. They do have an elastic band for a bookmarker, by the way. Not thick bungie like the H notes, but if that bothers you it's easily fixed by a friend with a sewing machine and under $1 worth of bungie.
I had Dive-wRites before (very similar to the Richies pictured in the post above), and while the pages themselves work just fine, I wasn't happy with the cheap vinyl cover and lack of any good way to keep the pencil tucked in. The X-notes are a very nice upgrade, without becoming absurdly expensive.
I guess the H notes have one or two more features than the X-notes, but not much, not enough to justify the extra money. I'm sorry, but I just can't justify spending $50 or so on a freaking pad of paper to write on. It's not life-saving equipment like my regs, and frankly doesn't offer enough advantage over the $35 X notes to justify the "H". I'm was happier spending the $15 on the Dive-wRites, but could see the value of an upgrade to the $35 version... I guess going up to $50 is over my limit. Not like I can't afford it, I just don't see an extra $15 in value, and don't like encouraging rampant over-pricing from Halcyon when I can avoid it.