Here's a link to some more pictures:
http://store.azmusa.com/picofgivcasm.html. One of these days I'll upload some of my own pics to the web. I have an E460 trunk with E21 saddlebags and more recently bought some E36s. With a decent size trunk and a tank bag, the E21s offer plenty of room for a week long tour including camping gear or two-up touring without camping gear if you pack light. I bought the larger cases to try two-up camping, but really appreciated the extra room for solo travel.
I really love the convenience of hard bags for both touring and daily commuting and errand running. As stated above, they are truly waterproof, but I wouldn't call them theft proof. They're more like a theft deterent. I keep valuables locked in mine all the time, but if someone really wanted to get in, they could.
If you do decide to go the GiVi route, I would recommend going with the unpainted cases as they're both cheaper and more resistant to boot scuffs. Also, if you want to go with the larger side cases you will need to either lower your exhaust (at least if you have an aftermarket can), shield your cases from the exhaust gases or extend your exhaust outlet or any combination thereof. If you don't, you will burn a hole in your side case. (I know for sure this is a problem with an aftermarket can, but not sure how much of a problem it is with the stock exhaust.) With the E21s, it's not really an issue as they are shorter front to back and sit higher.