JBL GT-BassPro12 on Punto E

Hello all! I am planning to add an amp and sub to my Punto E. I have already replaced the HU with Pioneer. Here are my current configuration details. HU: Pioneer DEH-6390SD Front Components: Rockford Fosgate R1652-S Rear Coaxails: Rockford Fosgate R152. I have been holding off the idea of getting an AMP and SUB as Vit M shortage :( I am quite happy with the sound that I am getting with the current setup, just want to add some bass to it. I need decent bass to listen and I'm not going to listen to loud music neither in need of thumping bass. I have found the JBL GT-BassPro12 info online on JBL and also in some posts. However, I am not sure if its worth the money. I do not want to lose lot of boot space by doing this either. Will adding a 10" Sub help me in this matter? Please help guys! please:

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