What I'm going for.

[bRaZEn_407]

Do you think a 40 watt amp is enough though?

Im assuming you mean 40 watts RMS.

Yes 40 is slightly weak but it depends on the speaker as well. Sensitivity plays a big part, as well as wattage requirement. Try to avoid speakers with a sensitivity rating south of 90db.

 

[JMillerUA6]

I had Boston SL60 Components and SX65 6x9's in the rear, powered by a 450w Alpine V12 Expert amp, and the sound quality was awesome.

I mounted my tweeters in the sail panels because I didn't want to put holes in my doors.

 

[bRaZEn_407]

I mounted my tweeters in the sail panels because I didn't want to put holes in my doors.

I would've done that as well if I owned a sedan, but theres really no flat surface on the coupes sail panels.

Coupe on left, Sedan on right.

 

[JMillerUA6]

I would've done that as well if I owned a sedan, but theres really no flat surface on the coupes sail panels.

Coupe on left, Sedan on right.

Ohhhh....indeed there isn't. That blows because that is an ideal location to mount them.