Need help with some info on these:

[sirsaechao 10+ year member]

So I have a pair of 5.25" MB Quart Reference series seperates in doors and a pair of 6.5" MB Quart Reference coaxial in the back...these are a few years old and I want to upgrade to full components and at least 6.5" all around. How are these and are these a good price for them? What else should I look into? I will be running these with my JL Ausio 300/4.

MB Quart QSC 216

http://www.onlinecarstereo.com/CarAudio/ProductDetail.aspx?ProductID=16050

MB Quart PCE-216

http://www.onlinecarstereo.com/CarAudio/ProductDetail.aspx?ProductID=13544

JL Audio XR650-CSi

http://www.onlinecarstereo.com/CarAudio/ProductDetail.aspx?ProductID=11421

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[tbasile1 10+ year member]

Qs FTW