i bought the slik 504 qf II not too long ago off b&h for a really good price.
and i have no complaints, really nice pans and smooth tilting, really sturdy, all black so it looks sick with the hv30
umm what else, relatively light for the weight it can withstand...
not sure what else to say, oh yea and i also use it for my hv30 and no complaints.
hope that helps