I went with the far less bulky CED 7000. It's actually got more options for different training and for setting up different timing options for various stages. I also prefer the buttons on the CED over the pressure pads of the Speed Timer. As they age the pressure pads can require some pretty serious thumb pressure and hitting just the right spot requires a little more care. With the raised buttons on the CED I can work by feel when I'm RO'ing or using it as a self timer for practice.
Price of them is all pretty close to the same. So it comes down to which sort you prefer.