Monitor Audio GX50 or GX100?

I am thinking on buying one of these speakers .I suspect the mids are better with the GX50 and I have a really fast sub to handle below 60Hz however I suspect the GX100 is more dynamic.I would appreciate hearing comments from those who have compared these two models.I am using the original creek Destiny integrated to power them,I have sand filled 24" stands and a medium sized 18 x 15 foot room.I like to turn it up once and a while but listen mainly at low to moderate volumes.

Thanks in advance

Bill