Which would you recommend for a yaris sedan single 10 inch or 12 inch sub

[sqcomp]

I've got dual 1/3 octaves for the right and left off the source. No worries about control. Yes they will be sealed, I can completely sympathise with the banging of the head against the wall thought. We WERE contemplating the sealed idea, but I nixed that with the space requirements for the frequency range and placement we wanted of the woofers. We also changed amplifiers so I'll ONLY be working with 1000 Watts at maximum for two 15 inch woofers. Oh bummer.