Both fit well in my car....but i'm split between the two.
http://www.amazon.com/VISONIK-VB-210PKG-Dual-Subwoofers-Amplifier/dp/B0006U2JU8/ref=pd_ybh_2?pf_rd_p=280800601&pf_rd_s=center-2&pf_rd_t=1501&pf_rd_i=ybh&pf_rd_m=ATVPDKIKX0DER&pf_rd_r=0XG4919NAVE5ZK5S1APP
http://www.amazon.com/New-800W-Dual-Audio-Subwoofer/dp/B001IAIYDG/ref=pd_ybh_2?pf_rd_p=280800601&pf_rd_s=center-2&pf_rd_t=1501&pf_rd_i=ybh&pf_rd_m=ATVPDKIKX0DER&pf_rd_r=0WEM2Q2AVCN6JM765XE9