First post here hope this is the right place. I am looking for a 10" sub to fit an MTX Audio Thunderform DDQC10U (made for Dodge Dakota Quad Cab) sealed enclosure. It is a custom fit behind the driver's rear seat. It is available with an MTX T4510 sub, which I don't want as the max power capacity is 225W RMS (I am looking for 500+). The T4510 is 4-5/8" deep and 9-3/16 across so it might need to be similar, but the enclosure is 8"D x 20-3/4"W x 16-1/4"H for 0.7 cu.ft. I will use an external amp so size and power (and price) are not restricted. What do you all recommend?