I have an 86 porsche 944 turbo and the speakers in the front doors are 4*6 oval speakers. The speaker depth in the doors is restricted to 1 5/8 in. What do you think will be the best speakers for this purpose (money is no issue for them but i do not want to cut/drill anything)? Also, the cutout in the door is in the shape of an oval like the speaker, so will a 4*6 plate style speaker also fit in this location? thanks.