I would agree with the need for a WSD. Any of the models geared for the US should have frame sizes that would work for you, I'm sure that Trek does, their largest WSD frame just barely fits me and I'm 5'7" ish with a longer torso than most ladies. I fit a 54 Specialized Ruby, I know that they come in 48. I loved the bike and would suggest a test ride. I think it's a good value and you can get different component packages.
Living life like there's no tomorrow.
http://gorgebikefitter.com/
2007 Look Dura Ace
2010 Custom Tonic cross with discs, SRAM
2012 Moots YBB 2 x 10 Shimano XTR
2014 Soma B-Side SS