Personally, I'd recommend Dual Strike first. Though the second one has a bit more polish and an impressive presentation, the story and dialogue are...well, they're pretty bad. The first game was funny because of just how over the top the characters and situations were, but the second one just didn't work. Gameplay-wise, it's still great, and again, it looks great. I just wish they either had better writers or stuck with the more campy nature of the first.