In my opinion it's not worth paying good money for a fitting, but plenty will disagree.
Just convince all the shops you visit that you're gunna spend big bucks, then pick their brains for all the info.
Did you try those online bike-fit calculators I posted?
My opinion (again), although it's shared by many
: what's really crucial is head-tube length an top-tube length. You've got stacks of scope with your seat post, but if you find your top tube is wrong for you, you probably don't wanna put a 9cm or a 14cm stem......because it looks ****.
But, seriously, you've only got a few centimetres with stem lengths to play with.
Head-tube length is a tricky one because you probably don't know how far you like bending over to hold the handle bars. If the head-tube is too short, and you're using a modern style stem and head-set, once again, there's only so high you can have the stem, even though there are different stem anlges available.
What's pissing me off these days is that I have a couple of nice,
non-compact aluminium frames in a 57 and 58, and the head-tubes are ~180mm and 185mm respectively (nice and long),
but if I go and get a new steel frame in a 58cm, it won't have lugs, and the bloody head-tube will be lucky to be 160mm!?!?!?! SO, I can't bend over that far
Jeez, I rambling.......again