We can't say we've ever been particularly impressed by the video quality delivered by the Tachyon line of helmet cameras, but they're a good choice for those who need a recorder that can take one heck of a beating -- if you don't mind some extra bulk. That fat has been banished in the new, slimmer OPS line which will be available in two flavors: a $90 VGA base unit and a slightly higher-end HD (720p) one for $140. If you're keeping track that's the same as the earlier XC
