Im having a Cd0.1 in ML which means stack=517 and reach=438. Its set up with a seatangle close to 80* and I have Zipp alumina aerobars with 25mm risers. Armrest pads rear end is 80mms behind the center of the base bar. I guess this indicates that I could really use a bike with higher stack and shorter reach? The fit however is good, i rode five hours yesterday with no issues and I would like to replicate the fit to my new bike.

I have always liked Trek Speedconcepts because of their clean looks and saw a lightly used 2013 7.5 size M for sale today close to where Im living. The stack is identical but the reach is only 408, 30 mm shorter than on my Cd0.1. Since I have the armrest so far back behind the basebar today i guess it wouldnt be any problem to make it fit since they are adjustable if I keep the risers?
The seatangle is achiveable on the Trek and the basebar seems to be swept more forward on the Trek compensating a little for the shorter reach.
Is my thinking correct? Btw, Im 5'11".
Thanks!