Thanks for the other brand suggestions guys.
I've kind of already short listed it down though from the big players to either the Kirk or RRS taking in to account my needs and wants etc. Just can't decide which to go for and was wondering if someone had something to say that I'd not considered or was aware of regarding these two.
I've seen one review online say that the Kirk wasn't very smooth, though other reviews contradict that. If I could buy them both locally here in the UK I would and just pick which one I prefer but I have to get the RRS head from the US and deal with import duty etc. so not quite so simple.