Although conversion to 700c can be easy it is my opinion that the rewards are so negligable that it's only worthwhile if 1. You can keep your present brakes and 2. You need new rims anyway. Otherwise, just buy nice 27" tires on your bike and enjoy them.

(I realize there are exceptions to this statement. Such as already having longer reach brakes and an extra set of wheels in parts bin waiting to be put on a bike.)