Why are people saying to buy a bike with 32mm tires when the OP already has a really nice hybrid bike that could be used for gravel roads and such. He said he wants a "road bike" and we assume he keeps the hybrid.
A good road bike is a special-purpose machine for going fast on paved roads. Some people who have only one bike might want to compromise but if you can have 2 or 3 bikes there is no need to. The handeing, rolling resistance and gearing on a road bike is not the same as what you would want for riding on a back-country semi-paved road. Road bike go fast. Even me, who is slow will easly get up over 25 mph on down grades. Handeling and "aero" begines to matters at 20 mph.
Hopefully after you have a proper road bike you get hooked and start doing 4 hour then later all day rides and cover some miles. You will find that you go way-faster with your upper body ducked to the wind but you may or may not be able to put up with an agressive aerodynamic riding position. I would figure that out FIRST before buying a road bike. RENT a race bike for the day. Make a mini-vacation out of it some place where you can ride 50 or so more miles over varied roads. Then you will know if you can stand riding one. ALL bike feel good durring a 5 minute tet ride. See what your neck and shoulders say after 4 or 5 hours. You just might like it, or not.
No matter what people say about big tires and comfort, When you have 100+ PSI in small tires the bike will roll really fast if the pavement is smooth. If you have good roads that are well surfaced then you can bump the pressure way up and you wil go noticably faster. So listen to advice on tires but ALSO look at where you itend to ride.
Look at used bikes. It is much harder but even a nice high-end used race bike sell for half the new price or less. If you like your Cannondale, then look for a used CADD10 or CAAD12