With the swept back - type bars (like the latter three you list), it would seem like you'd have to rotate your hands out too far for the bar ends to be useful (thumbs pointed outwards). What's been your experience?

^^^^
The Ergons that I've been using are the ones without the bar end grips.
But I would think the mary bar would be ok with the bar ends, the albatross and north roads defiantly have too much sweep for them though.

+1 on the ergons. I just put them on my MTB flat handlebars, and I don't know what I did before them. It was a similar "Aha!" moment as when I started wearing gel gloves.

+2 on the Ergons. I have the ones with the bar end grips on handlebars very similar to Allen's mary bar. I only got them Friday, but the difference they have made in such a short time really surprised me. Even my posture has improved.

For anyone who might be wondering, the size large Ergon grips won't work with the Nashbar Trekking bar. The straight section of the bar is not long enough to accommodate the Ergon grip, let alone shifters and brakes. And the grip is pretty stiff, so it won't curve around the end of the bar like some other types of grips might. You might be able to cut the grip shorter (or buy the small size) and make it work, but I can't confirm since I don't have that size.

Oury.

Update: After using the Ergons for a while, I can say they are indeed an improvement over standard grips. But I wish the integrated bar ends were a little larger.

Another vote for Oury.
Stick a nickel inside the ends to keep the handlebars from rubbing through.

You're right! I can't believe I wasted 10 cents instead of driving (or riding) to the lbs and asking for something for free! :D

edit: the smiley denotes harmless sarcasm. not trying to be an arse. ;)

I put Ergons on the "Captain" bars of our tandem a few months ago and they are much more comfy than any other grips I've tried. They spread the load out. On the other hand, I just put new grips on my recumbent and it doesn't matter. On most recumbents, there is almost no pressure on your hands and any old grips and any old gloves will probably be just fine, thank you.

I'm sure that Oury grips are very nice, but at least based on their website, I don't understand why they would be comparable to Ergon grips, which have a wide section upon which the heel of the hand rests. The Oury grips appear to be the fairly standard cylindrical shape.

Am I missing something?

Yes!
Oury's are just cooler looking! :D

example... my new ride i'm just putting the finishing touches on...

http://d2creative.smugmug.com/photos/174366106-M.jpg