I have a '95 XB2003 with a '95 225 Mercury Promax. It came with a 25° trophy plus 4 blade prop. The 25 had a little bend on the end of one ear, I ran it like that for a while. The oddest thing, before getting the prop fixed, I could run close to 50 mph at 4000 rpms, but couldn't really handle the boat long between 75-80.
I get the prop fixed (back to factory specs) and at 4000 rpms can only do around 40 mph, but I could continually run in the low 80's.
I bought 2 props from a fella on bbc a couple months ago and finally got to try one out the other day. I got a 27 and a 28 trophy plus 4 blade both in great shape. I put the 28 on and as expected it comes out of the hole just a bit different than the 25. It also will do 55 mph at 4000 rpm's (which I like for just cruising, better fuel economy), I ran it up to 80 one time around 6k-6.5k rpm's (don't remember exactly). It had been a while since I had run the boat so I was "out of practice" is why I didn't go any faster. All in all I like the 28 very well and can see me keeping it and the 25, selling the 27 and putting that money toward a 30!!!