might be quite expensive, plus you need to be sure the geometry of your bike will allow a good fit with drop bars.

Get ready for:
* getting drop style brake levers, either made to work with V (e.g. Tektro RL520, no integrated shifters) or cantilever brifters, you need to use a travel agent to make it work with your brakes. Or change V for cantilevers. Or get Sora 2013 brifters, they are supposed to work with both, short and long pull brakes.
* drop bars will likely put you lower and stretch your farther forwards. That may result in very uncomfortable position -> say hi to the back pain. You may need to get a riser stem, to fix that. Try various length. Use competitive cyclist fit calculator (french fit option) to get some numbers.

I've done it though and it worked Ok. Here is what i'd ended up with (note the short and tall stem):


Today I would probably get a longer stem and bars like this:



Or trekking bars with some backsweep, something like this: