From talkin with Hitec CS they will be shipping around July. MSRP of $179. Basically their torque spec rating is HOLDING power and not the stall point. I myself am looking forward to them and will pick a few up, but will not be replacing any of the Hitec HV units I have since even these are overkill in terms of both holding torque(about 50% HIGHER than rated spec)and the actual stall rating(given spec). Hitec's 7954 HV servo for about $80 online shipped is still the best value per dollar for a ultra high end servo with over 400oz. of torque at stall(600oz holding power)and a fast transit speed of .12 at 7.4 volts.
WHat the new brushless servos will have though for advantage is speed UNDER LOAD(The speed spec given is at FULL load instead of no load), lower current draw,and they will be quieter(and no brushes to wear out, even though it will take quite a few years to wear out Hitec's own coreless motors

)overall. You just have to figure out if any of this is needed vs. Hitec's current HV offerings for the extra cost added.