Will they throw in a pro fit for you? That's worth it's weight in gold. I've had a trek and a giant. I liked the giant okay for short rides, but I much preferred my Trek to it. Just sold the giant, actually, and bought it used to begin with.
Do you have a used bike store? If you don't need anything super fancy, it can't hurt to look. I am very short - 5 feet - and I don't get many chances to buy used roadies or any bike that small (48 cm), so I can't use them much. If you are a more "average" size, you can get away with it. 5'8'' would be fine, I'd think.
Either way, the ladies have already recommended some comparable bikes. I can't do it with anything but roadies, but it's up to you. Try some out and see what works And warning: cycling is addictive.
***proud Hoosier, statistics nerd, and mom to a headstrong toddler***
****one car family and loving it!****
Owned by:
Le Monstre Vert - 2013 Surly Cross-check
Chessie, Scottish Terrier
Bonzai, Catahoula Leopard Dog