Hi,
Personaly I've tried Futaba 9206's which are coreless analog servos, they work great for me and are cheaper than 8411's.
Incidentily I also know of a few people who have had 8411's fail on them. On the flip side I've had hitec servos last about 2 weeks before theyre knackered!...but I've also had Hitec servos last years!....just depends wether you get a good 'un!!!