Current setup:

Alpine deck, JL Stealth box, 2 JL AMPs, MB Quart front components.

I got the rear cut outs to install rear speakers for the 5.25'' behind the seats. The usual shop i go to has the Diamond M5's without tweeters since they broke the kit up for their own use. I can get this installed for $180 for the labor, wires, and parts itself.

My personality to music at the moment are:

My system is too clear for me, with insufficient bass. When the song contains good bass (R&B, RAP) its fine, but when it comes to rock or alternative, the mid's are just lacking.

Question: Will these Diamond M5's do the trick and fix my system for the mid's / low's?

Are the Diamond M5's a good speaker?

Am i getting an o.k. deal?

Any information would be greatly appreciated as im an audio newb. Thanks!