I'm not sure how many people here are concerned about light weight brakes but I thought I would go ahead and post this anyway. Maybe it will save one person some money.
I have been running Magura Marta SL's for a couple of years now and overall I am pretty happy with them. However, lately I have been having problems with the levers sticking so I need to send them into Magura to have them worked on. I don't think they will give me any problems servicing them but I really don't want to go without my bike for a week or two while they have them. To avoid this problem I went ahead and ordered another set of brakes, this time I went with the regular Marta's. I figure it is a good idea to have an extra set of brakes plus I'm going to be building up a second bike in the future so I might as well have some nice brakes to go on it.
Anyway, I went ahead and compared the weights of the Marta's and the Marta SL's when I did the change.
The first picture is the front Marta. The second picture is the front Marta SL brake. Keep in mind it does have worn pads so add a gram or so to make up for that.
On the front brake comparison their is only a difference of 8 grams. That's not too bad considering that the Marta SL front brake costs $56 more than the Marta.