ORIGINAL: XJet
A more cost-effective option might be the [link=http://servocity.com/html/hs-5625mg_digital_speed.html]Hitec HS5925[/link] but by today's standards, they're still pretty pricey for a 3-pole digital servo.
In their infinte wisdom (and arrogance) the RCU moderators seem to have disabled my ability to edit my own posts so I have to post this correction I meant the HS5625, not 5925 above.
Sigh!