another at 5'8 with a 32" inseam.
i have a trek madone size 54 and a trek 5200 size 52.
there's a vast difference between the two, including crankarm length and handlebar width.
the 5200 was my first ever road bike. being new to road biking i had the seat and bars about the same height.
the more i rode the higher my seat got and the lower my bars got.
so i went to the 54 which is a very good fit, with the seat about 3 inches higher than the bars which are on a 110 stem.

i've had full custom fit twice but have since relied on feel for tweaking the fit.

see if you can find a bike shop with a serrota size-cycle to get you in the ballpark.