I'm using the Cactus V5's. Good range, reliability and battery life. If you are worried about flash voltage, you can put the flash transmitter on the hot shoe and then put your flash on the transmitter. This should allow you to use "on camera" flash without the voltage problem. Obviously, off camera is fine, too.
One thing I really like about the V5s is that you can use them as a wireless remote control, which you can't do with some of the other cheaper options.
Previously, I was using the V2s. The V2s had poor build quality. After a couple of years, they just stopped working. The V5s seem much better in all apsects. But I've only had them for a few months so can't talk about long term reliability. I've never used pocket wizards, so can't compare directly, but I understand that the build quality is higher and the range is longer. Like most things, you get what you pay for.