If you want larger speakers ip front, buy some q-form kick panel pods. They replace the kick panels and have two pods in each enclosure; one for a 6.5 and one for a tweet. Both angle the speakers toward the driver.
Besides, you would not be able to fit a speaker than size in the door, unless you never wanted to roll down the window again. Plus, if you ever upgrade to an afternarket HU, and don't add an extra amp, then the door speakers won't even work. Not much point in upgrading them.
<span style='color:gray'><span style='font-family:Courier'>1995 e36 3 Series RIP
1999 e46 3 Series BURN IN HELL
2000 MR-S Roadster= Current</span></span>