Because I am constantly traveling over a number of states, I'd like to start geo-tagging my images so I can remember where they were taken. Neither my 5D2 nor 7D have this built in, so I would need to consider a dedicated piece of equipment for this. There seem to be a number of options available, but nothing really stands from the pack. I'd be interested to hear how others are doing this, and what they like or don't like about it.

Thanks.