My .5 is using an Airtronics 359 servo. It's very fast at .10 sec, and has plenty of torque at 200 oz/in. And BTW, there's no such thing as too much torque when it comes to steering servos

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SH Z-Car, Custom Crawler, 8s Savage,
12s XTM XLB 1/7 buggy,
4wd 4-link rear/IFS Pro4 truck,
Custom Hyper 10 Short Course,
Belt-Drive Mammoth ST 1/8 truggy, 4s 17.5 MM Pro HPI Blitz