Sorry if this has been asked a million times already but I'm in need of a new pipe as my stocker keeps cracking and won't stay in one piece. So I'd like to get a pipe that will give me more mid and top end power. Which one of those two will give me the best performance in those areas. Oh and I'm running the the FMF PCII for my silencer and maybe mating it to the Fatty would be the best combo, then again the Pro Circuit may be better, I don't know...? Oh I've also got a Flatland racing pipe guard I've been running on my OEM pipe, hoping it will still fit one of these pipes?