first time, upgrading my sound system

hi this is my first time doing this, so im kinda noob. i have a mitsubishi lancer 2012.

i did some research for front door, dash, amp and bass and this is what i found



HD-6 - CDT Audio 6.5" High Definition Midrange Speakers

WoofersEtc.com - HD-6 - CDT Audio 6.5" High Definition Midrange Speakers




MT-22 - Morel Accuflex 28 mm Soft-dome Tweeters

WoofersEtc.com - MT-22 - Morel Accuflex 28 mm Soft-dome Tweeters



for the amp i found this

WoofersEtc.com - PMA6004F - Alphasonik 4-Channel 1000W RMS Class AB MOSFET Amplifier

but im not sure, it say it has a built in crossover, but wonder if it would be better to go with an external crossover for sound quality.







and for the base im not sure



QES-1220 - CDT Audio 12" Cast Audiophile Excursion Subwoofer

WoofersEtc.com - QES-1220 - CDT Audio 12" Cast Audiophile Excursion Subwoofer



S12C4 - Kicker 12" Dual 4 ohms Solo Classic Subwoofer

WoofersEtc.com - S12C4 - Kicker 12" Dual 4 ohms Solo Classic Subwoofer



IDQ12V3.D4 - Image Dynamics 12" IDQ Version 3 Dual 4 Ohm Subwoofer

WoofersEtc.com - IDQ12V3.D4 - Image Dynamics 12" IDQ Version 3 Dual 4 Ohm Subwoofer




right now im stuck with those 3. im gona go with a sealed box, i didnt chosed yet an amp for the sub



i want to know what you think so far with what i have in mind, it my first time doing this and i dont want to buy stuff that wont work.