I would suggest you go over to the Suspension / Chassis / Brakes sub-forum and read through
the Brake Pad thread. Lots of good info in there on pads. Your idea of switching over to the EBC Yellows and Motul 600 is pretty much the stock answer to your question. Lots of other good info there also.
Whether pads squeak seems to be dependent on a wide variety of factors. The exact same setup will squeak for some, and be quiet for others. (Might be some sensitivity to the sound also.) I've found on all my cars that some brake grease on the back of the pads does more to quiet them than almost anything else. You need to stop the pad vibration to make them quiet, so some sort of gooey substance will help to damp them and lower the noise.
Just make sure the substance stays on the BACK of the pad. Never put anything on the face of the pad that touches the rotor. That will always wear out quickly, and could be dangerous if it reduces stopping force.