I second the 622 as well. Only downside of those is that they are fairly bulky. The eTTL support is really great if you have flashes that support it. They even work with my Sigma flashes. (something that did not work when directly connecting them onto my 7D)
If you don't need eTTL however I would look at something cheaper. I also have a set of Pixel Soldiers. They are a bit cheaper and much smaller yet get the job done just as well if you work with manual flashes only anyway. It would really help to get some more info on what you are planning to do with them.