MBS-Class

I just bought brembo eom rotors for my S420 and I need breaks what would you recommend?

I have this on the rear now got put on about 2 month ago:
http://www.primechoiceautoparts.com/...amic-mmy-.aspx



And this in the trunk because my dad ordered extra by mistake:
http://www.primechoiceautoparts.com/...amic-mmy-.aspx


These pads make a lot of noise now but the rear rotors are warped so that may contribute. What pads should I buy to get good breaking, low noise, and good life out of them?

Should I just order a set of rear primer choice cause I already a set of the front?

Or should I get different something different all together?

A friend recommended hawk pads? Is that good?

Also how much should labor be for installation of all 4 rotors and the pads?

Thanks