A DIY rule: Don't fall prey to marketing propaganda

I wouldn't use a driver that has a weak bottom and top end
because it can create more problems to solve, assuming
the driver you want has those issues.

If you want to build a line array, have you auditioned any arrays
to establish a reference point?

What is wrong with a coned driver 4" - 6" mated to a line of
tweeters $4 - $118 ?