I'll actually add real quick....

The 8.8 is less than 1/4 inch smaller than the 9 inch, and much easier to scout/narrow/install, and it can be upgraded almost exactly the same as the 9. It's pretty tough to beat.

I also made 4 or 5 write-ups regarding identifying, selecting, narrowing, and installing an 8.8 into a MM. They're located in the tech section..... can't miss them. You can also read my build thread which has lots of pics and such showing the install.