I also love my Amira. I have the 48cm. Loved my Ruby although it is a 2007 and since then Specialized has fine tuned the handlebars on the women's geometry bikes. I was not comfortable in the drops of my Ruby at all and it was a 51. I am very comfortable in all postitions of the Amira and the bike just rides awesome. +1 on all Eden said about it.
I am also not a fan of Trek not that was always the case. It is just my personal opinion of the company, customer service etc. So I cannot help you in to go in that direction.
2012 Specialized Amira S-Works
2012 Vita Elite
2011 Specialized Dolce Elite (raffle prize) - Riva Road 155
Ralaigh Tara Mtn Bike