Should I get a bike that's too small for me?
Riding a bike in the wrong size (either too small or too large) for long periods can lead to all kinds of lower back, upper back, neck and shoulder issues en various leg injuries, mostly in the knee. Also, your power output can be reduced significantly. So a properly sized bicycle is important.

However, "properly sized" really depends on the rider. Sheldon Brown has a lot of good info, but mostly it comes down to:


Try the bicycle to find out how it feels.
Compare it to your current bicycle.


Finally, you can compensate some sizing issues in this specific case with a longer stem and/or higher saddle. How this works also depends on the relative length of your legs and your upper body.