Having ridden most of the Shimano groupos over the years, I'd suggest you'd might be happier with a better groupset - say 105 or better - on any bike you purchase. My experience has been that the Deore and Tiagra components just don't shift very smoothly, nor do they hold their adjustments for any length of time. On the other hand, if you like to play with your bike and tweak the adjustments and settings all the time, you will have your work cut out for you.