I love reading that the 2004-2006 TR21X is the best hull but I really wish I could get my 2005 TR21X dialed in, I have a 225 opti that I had rebuilt a few years ago and have not been able to put more than 10 hours on it but it has been an absolute dog only seeing 65, I think pre rebuild my best was 72.
I prefished with a guy that had a '97 Tr21 with a 225 'Rude Ram on it and heading upriver I saw the GPS at 80. No clue how fast that boat would actually run but it would haul.