There are quite a few strobes that integrate seamlessly with the Canon system. For example I have the Indra 500 which has all of the features of the Canon speed light and the extra power. I just can't imagine spending all that money on a speedlight, especially if most wedding photographers use 2-3 speedlights. I often have two off camera flashes, and on camera flash, and a strobe all going on in different areas of a wedding reception. If that were a profoto system it would be A LOT of money.