Midrange selection

I am building a 3 way system and want to crossover at 300 & 4000 Hz. I was going to use a Morel wr-4 but I am running out of room in my doors. I have been thinking about running two 3 inch drivers instead of the Morel. The Aura's and HiVi BS3 seem like logical choices. Can anyone comment on this possible setup and make a speaker suggestion?

Also I have heard that the HiVi are 'not dynamic' possibly because of their sensitivity. Is this fixed by using two midranges per side?