I wouldn't bridge anything, the tweeters are more sensitive than the mids.
You should be better off running each tweeter on its own chanel and each mid on its own chanel. This will give you 40w each to the mids and around 27w each to the tweets, but it doesn't really matter because you will have individual control over the gains and be able to control the level so that they blend well.
I have the same drivers as you on passive crossovers recieving 75w rms each side and they are loud as fook and still sound excellent.
Something else to note: The PL7 mids will take some time to break in and really sound powerful, but when they do, you will be very pleased!
Something else to note: Sound deadening will be needed!
