just found a spec chart for the savox servos, the SC-1258 and SH-1350 correspond with the SD610 and DS510. SC-1257 to DS620.
Pretty nice numbers.
The PDF chart url is down on this page:
to answer my own question, here more info I found:
just read some on the DS610 being really noisy, to the point of affecting the gyro if if anywhere close.
Found also more info on Helifreak on guys using them
plus a mention of a DS620 tested to dead with good results.
for the rest here on RR. These Align servos sound very promising and affordable. Tempting...