I run the bar-tek toothies, very happy with them tbh. They seem to be lasting longer than the psd pulleys i bought previously, and the weight isnt that much of a difference than the standard pulleys.
I think all toothed belt setups will strip their teeth after a while, as they are under quite alot of strain.
I got 15k out of my last belt, which i think is quite good considering i was doing a belt every 2 weeks with my old setup!