I agree with
@dougl . But, hey, you guys going after this do want you want. We might all learn something.
I'm not one to talk after rebuilding my Roadster with
@Neville Lush components and changing the pipes, but that was a big move guaranteed to produce big results and it absolutely, positively, without question, did. I think some of the "push back" you're hearing is that you're trying to squeeze out itty bitty HP differences by chasing these tunes in an attempt to chase numbers.
Beyond Penner's free tune I just don't think (and I may be 100% wrong) that you're going to FEEL that much difference when you're out riding and that's where it really matters, not chewing the fat outside the bar pointing at the bike and quoting numbers. You should be blowing by most bikes out there right now with the stock or Penner's tune.
But, throw some cams and pistons (or turbo) in there with some headers and THAT will be money well spent. You will now have a bike that is faster than a 2.5 Rocket and, as with the 2.3s, that really IS something, all numbers aside.
OK, I'll shut up now and watch with interest and an open mind as this holy grail quest continues...