You are right. Cards are good at home and Houston has stumbled every time they have the lead.
Some other games that look interesting...
* GB -2.5: Rodgers may be out, but the Pack is at home and chances are the D may step it up a notch. Philly had a big game last week, time for reality
* Buf +3.5: If Manuel plays, I like their chances against a Steeler team that for the first time in years, has a weak, aged defense
* Oak +8.5: The Raiders had a bad game last week, expect them to bounce back against a Giants team that shouldn't be favored by over a TD
* Sea -6.5: The Seahawks took last week off against TB. I think they will get their game back in Atlanta and win big
Good luck