I'm 5' 4" and have a 51cm Jamis Quest--it comes in a 48 too. Though it doesn't have disc brakes, it's a nice smooth-riding steel frame with carbon fork. You can put a rack and/or fenders on it. It's fun as a road bike, and I now have it fitted out with a rack and fenders to be my utility/commuter bike, which is working out really well too. It has clearance for some wider tires if you want to go that direction sometimes--overall a very versatile bike. Mine is a 2010, and they've changed the line up a bit now--it looks like the equivalent would be a Quest Elite. They also make it in a women's line--I haven't looked into what all the differences are, as the men's fit me just fine.