Originally Posted by Wicked CAS

2 different animals here.
900/5 will certainly have more power, I would not even do rear speakers I would run the 900/5 front and rear channels bridged to the front speakers. 13tw5 will certainly keep up with what you are used to, will need to be properly tuned. There is the spot right under the strut bar where there is foam and it is a void spot for an amp install.