What sort of riding do you do - are you looking for speed, comfort, off road, on road?
If mixed riding, with some rougher stuff and you are not fussed about speed, how about something like a Specialized Ariel? How big are you? You may be better looking at a men's bike f larger (at 5'10 I find womens' bikes too small)
Do you have a budget? If say around £300, rather than £450+, the Carrera Subways from
Halfords have a good rep (unlike the retailer). Also, go to your local bike shop and see what takes your fancy in your price range