EMC vs. Mach2

greetings,

i am currently using a controller software called mach2 which is
windows based but it seems to have problems with lost steps and some
other issues. my questions are does anybody have experience using
emc and mach 2? if so what are your opinions of the two. mach 2 has
alot of capabilities for blending and constant velocity contouring
as well as an exact stop mode which is supposed to be more accurate
but produces tool marks on the part. there seems to be some issues
about the blending and rounding of toolpaths when using the constant
velocity modes in mach2 which makes me think that the resulting
finished geometry may not be correct in some conditions. what are
some of the toolpath characteristics of emc as far as its smoothness
and accuracy when machining short linear 3d moves like when your
machining a mold cavity? i really could use some guidance here
as far as selecting a software. anything else you could add would
be great !

thanks in advance
jeff