Synolimit if that is what your use to and feel comfortable (having a flex pipe) for your ease of mind then by all means go buy an exhaust or header that has one. After Chris explained the reason behind F.I. part of not having one and the countless of reviews and support. If you still don't like the answer or the exhaust then look elsewhere.
As far as your TQ comment, I'm guess your basing your opinion because or your two WRX's you have. That is a bad comparison. You are comparing a turboed boxer engine vs a N/A V6. Not exactly the closest thing to compare to.
Please save your opinions war for PMs and if you have further questions I suggest calling F.I. directly.