One other issue I thought I'd bring up was your driver selection. I didn't actually look at the specs, but it looks like you may have too much overlap and not enough coverage with those drivers. I'd expect something in a three way design to go with a tweeter, a 4-5" mid and a 10-12" bass driver. From what I've gathered, look at the FR charts for the drivers. What I'd look for is for the drivers to have a minimum of 2 octaves where they overlap on a (relatively) flat response.
For example, if you have a tweeter that has a frequency range of, say, 2,000Hz-25,000Hz, I'd like to find a mid that is flat up to 8,000Hz and then pick a crossover of 4,000hz.
Just more stuff for you to ponder..
JCD