Granted I'm guessing the factory amp on the other 2 speakers is probably about the same?
Yup, should be.
I'm also debating the 3 way speakers with 2 way in the rear doors instead. I was reading the 2 way can provide cleaner sound since the tweeter is in the center of the cone where as the 3 way obstructs the cone more
Personally the only way I'd run three way speakers in any vehicle is if we're talking about component sets with a separate midbass driver. A decent two way should be just fine in all locations.