Welcome to the forum!!!
Yes, if you want the fake look placing the implant over the muscle would be the way you want to go. The implants have to be positioned well, and you will have to worry about capsular contracture.
As far as rippling with saline, it is not a huge problem, unless you go too big or have the implant placed over the muscle (little uh oh here for you regarding placement).
How big are you going, and what are your current measurements (breast size, height, weight)?