Show me a tuned UEL header that makes more power across a 3200RPM span from 4000-7200 than its tuned EL counterpart, on any make or model, vs a UEL that only makes more power than an EL across the 600RPM dip. Why would you want to make more power for 600RPM and sacrifice the 3200RPM above it? Chewbacca lives on Endor!
With that said, I agree with you completely about the FT86 SpeedFactory header. It is quite remarkable (I really like the company and their products), especially without a tune. I will say that if your goal was a 100% warranty and emissions friendly build, the FT86 SpeedFactory catted header without a tune would be the way to go. I hope they build an EL catted header in the future, because that would be a killer setup. However, with a tune, this Tomei EL and the HKS EL cannot be beat.
I believe the UEL vs EL argument holds true across all platforms, not just the 86. It is pure physics and from a physics standpoint, UELs are an inferior design. ELs flow better, period. Headers are "racing" parts, so if you aren't using it for its intended purpose (make the most power, expecially up top), isn't it kind of a waste of money?
Now, the OFH is a GREAT value and GREAT product for the money. I can definitely see spending that kind of money on a UEL because there is a big price gap between that product and the others. It also makes some good power with the OFT. But if we're talking apples for apples money wise, I wouldn't pay apple money for a grape.
Spending $1000 on a header because it sounds a certain way is downright silly. You might as well install one of those electronic blowoff valve noise makers as well. For $1000, I would ride along and make UEL, EL, and blowoff valve sounds for you. That offer stands... I'm available for rent.