I see this as two different issues which should be kept separate. The fit. Is it right? You will only know that by riding that position long enough to know. And second, the bike. Number one is that the bike should fit you. (If the fitter got it right, that would be the bike he suggested.)

So far you have a couple hundred dollars invested. I would strongly suggest you spend less that a thousand to get a (probably used) bike to confirm the fit numbers. At that price, going to an ugly/wrong seatpost or stem to dial the bike in isn't a big deal. Only after you know that fit is good or you have evolved to a position that is just plain "right" should you start thinking about spending big money. (When the bike is right, it feels just plain good to get on and ride. Hard efforts are fun. Nothing detracts from simply riding. Now, if you get to that point but your used bike leaves you with too much weight on the front wheel, handling you don't like, toes that seriously hit the front tire, etc., now, finally, you are at a place to consider spending more bucks to get those issues right.

Most of the bikes out there require I run a stem most would think is ridiculous. When I first started looking for a ti bike, I wrote a computer program to quickly take brochure frame specs and tell me what stem I would need and what the weight balance on the tires would be. (By this time I had many miles on bikes that fit, first an unusual bike I raced in the '70s and then a commuter with a 180mm stem.) I found every production ti bike out there was a real compromise; a very expensive compromise. The ti bike went on the back burner. A few years later I landed a sweet job. Withing two months I had a custom ti on order. No regrets whatsoever. The extra probably $1000 I don't regret at all. The bike is a compromise, but the fit is not. And the compromises I choose so the bike would do what I wanted it to do. None were forced on me.

I have now acquired several bikes that are not compromise fits and do various things well but none are off-the-shelf bikes. Oh, the frames once were - a not very special early '80s Trek that serves as an excellent winter/rain/city fix gear and a 10 years older Raleigh Competition set up as a grave grinder (and no decals so it can go in town as a repainted beater - a Reynolds 531 beater).

But to get back to my point: I had my fit dialed in before I started acquiring these bikes. I knew what I was looking for. And I had thousands of miles on bikes that fit.

The fit is what is important. How you get there, less so.

Ben