Hubby and I just bought our first road bikes - been where you've been!!
I have the Dolce Elite. I loved the while & purple. Rode the Ruby and it was awesome - just too much $$ for our first bikes.
I'm 5'4", and am on the Medium frame (about a 52 I guess). One shop wanted me to get the Small Frame, another said I could even go to the Large. I was most comfy on the medium, so that's what we bought.
My best advice is to be patient, ride a lot of bikes, and go with the one you love.