Im no pro and about 2 months late since I see you posted in July. Even though I havnt rode any other bike, I can say that I love my Giant OCR3. I am 5'3- I purchased a small lightblue giant OCR3- a match made in heaven :P. I like the fit- its not huge and bulky- but its not too small either- its great.
I think its a great price for a road bike to start with, I got mine for $599 (Which a month later went down to $499- whats up with that!?)
But I think its a great bike but still- look around.

I dont know- maybe you already purchased a bike.... if so, which one?
:P

Take care,
Shannon