I have a 94 with a 330/310hp 454 and swing a 23 Mirage to 4600+. I just tried my friends 25 Mirage and it did exactly what it should and dropped me to 4200+. I would suggest if you to try a 25 mirage before you spend the $$ as a used 25 mirage used is easy to come by for say $200.
PS...yes you need a LOT of seat time in one of these, even at 35mph they are "different".
Nick
1994 22' Classic-454 B1 Red & white
1981 13' Whaler sport(original owner)
South Tampa Bay, FL "May I mamoo dogface to the banana patch?"