The Opsal Cast Aluminum pads are a longtime favorite of many, $76. They have a reputation of being very durable. I have never used them.
http://www.treestuff.com/store/catalog.asp?item=1582
The Climb Right Ultralight Pads: $119
http://www.treestuff.com/store/catalog.asp?category_id=70&item=1861
They are a great pad. Two of the key difference between the Opsals anf the CRs are the angled shank entrance on the CRs which is a huge comfort difference and the rigid connection of the CRs which eliminates the rattle connection on the Opsals.
Here is my review on the CR's from Treestuff.
"Havent spent alot of time on them but did a few small removals and so far they seem awesome. The attachment between the pad and the spur is rock solid. I am very tall, 6'3", and have them adjusted as high as they will go, i kind of wish they had a female to male extender available so i could put them up a little higher but i cant really complain. There really is no pushing/twisting of the spur shank at all against your leg, this is traded for a sort of leverage between the top of the hard pad and your shin, the foam in between is really dense yet soft and because of the velcro it can be moved. It comes centered but i offset it a little bit aimed towards the top which lets it bend over the top of the hard pad and shield your leg. My other pads are buckingham velcro wraps, without the steel, and i was never able to get them tight enough for my skinny calves because of the length of the velcro, which caused me all sorts of problems. These get plenty tight enough for me and even more so if you are skinnier The only other downside i noticed so far, beyond the sleight height issue, is that the top of the pad creates a little bit of chafing between my jeans and my shins, i think for a full day removal it would be worth it to throw some athletic tape on my shins to reduce the friction. The aluminum construction seems really rugged and is a welcome replacement to my old hand-me-down rusted over buckingham steel climbers. I cannot imagine them wearing out any time soon. Overall i feel like these are a great product; really light without the cost of the titanium rigs, very sturdy construction, no spur shank digging into your leg whatsoever, comfortable, and they look sweet. "
I have mine on the Climb Right Aluminum spurs and its a great set. $275 all together.