I personally have two of my entry level rental set ups using the 25's. They arent too bad for point and shoot cameras, however, they do not put out enough light for wideangle shots, and they do not give you the versatility of the larger strobes. All of my customers have opted to go with the 90DX or the D180 and have been happy in doing so.
Using an Inon adapter to your Canon housing allows you to use a wide angle lens, which will require more lighting for proper coverage. I would consider going with the YS 90DX or the D180. Both are excellent strobes, and, should you decide to get any accessories for your camera, or upgrade at a later date, you will not have to reinvest in a new strobe, your current strobe would still be ideal.
Email me with any questions you might have and I will be happy to help.