Amnes,
My speakers and up and running - the only thing left are the grills. I am very happy with their performace. I will try to upload some pictures in the near future.
All in all, I highly recommend 2" for the MHF (as oppose the 2425 1" in the original 4345s). I made my 4345 almost all stock, but installed jumpers behind the speakers so I could use the JBL 2441+Westlake-like-smith horns on top of the speakers in lieu of the 2307+2425 I installed in the speaker cabinet. If I was to do this all over again, I would simply use the 2311+2441 inside the speaker. There is no reason to even try the 2307+2425 if you are building from scratch.
It's not that I don't like the 2307+2425, I just personally prefer the sound of the Smith-horns+2441 more. I'm guessing this may be due to the fact the I am using crossovers that were designed around the 2441 (i.e., Giskard's latest 3155 equivalents networks) as oppose to using crossovers that are designed around the 2425.
Good luck with your project.
-DK