Those numbers seem in the right ballpark to me Skipper, though the same height as you I'm a bit longer in the body and shorter in the leg. So I probably have a lower saddle though it's hard to compare via ST measurements as that depends on TT angle. However my ETT is 615mm and HT 200mm - a bit longer and lower - which would sound about right to me.
Crank lengths, well I stick with 175mm, I have toyed with ideas about longer cranks and you can easily find recommendations that would suggest 190mm for me and about 195mm for you. However those cranks are limited production and very expensive. I think you can get up to about 185mm with mainstream ones but only at the top end, so expensive again, of the scale.