I have 2 carpet knives and 4 corally 1/12 scales in my collection (also have a couple old kyosho fantom 4wd in the rc garage). As for a chassis, it is purely personal preference as all the top kits are equally competitive. Corally, xray, serpent, associated, Kyosho, yokomo, all offer great cars (there are several others as well)
Between the Crc and kyosho I would go with .... Both. I know the Crc is an excellent car but that kyosho is so sexy