I much prefer Dxtory to Fraps. Dxtory takes a little extra time to set up but that's a good thing since you can change it to better suit your preferences. The reason I started using Dxtory was because you can set a separate audio track for your voice and that makes a huge difference. It lets you raise your voice volume in sections where the game gets loud or raise the game volume if it's too quiet without making your voice clip. The best part is you don't have to fool around with syncing your audio to video. I've been using the lagarith codec but I've been experimenting with x264 codec and that not something you could do with Fraps.