jvc kd-r995bts

Question1: Is JVC KD-R990BTS -or- JVC KD-R995BTS better suited for my application? Question2: Should I install the "crossovers" provided with alpine spr-tw10? Question3: Should I eliminate the "Infinity" amp from the "in-line" series? 2001 Dodge Dakota Sport Std Cab with Infinity Sound System...