If my catalytic converter is rattling and my exhaust pipe is rusted, do I have to replace both?

If my catalytic converter is rattling and my exhaust pipe is rusted, do I have to replace both? - 1

Added (1). I've got a 2001 Honda CRV and the catalytic converter is rattling and I've lost a little acceleration power. Also, there's a fair amount of rust and the mechanic said the whole exhaust pipe/muffler would have to be replaced if I want to replace the catalytic converter. That's too expensive, is there a cheaper way?

Do I need to replace my catalytic converter?

Do I need to replace my catalytic converter? - 1

Added (1). I've got a 2001 Honda CRV w/ ~185,000K on it. Heard a rattling sound and had loss of acceleration power. I took it to a mechanic and he said that I needed to replace the catalytic converter or it would get clogged and could blast out a valve. Also, exhaust system has rust so he says he needs to replace the whole thing from the cat back… Please advise.

Added (2). I'm mainly concerned with the blowing up the engine or starting a fire. How likely are either of these to happen?

Is Honda or Volkswagen better?

My aunt is deciding on a used car, and she's wondering if she should get an Acura TSX or a Volkswagen Passat. They're both 2012 models. The Volkswagen costs less, but the Acura is certified-pre-owned.
I've heard many people say that Volkswagens are built better than Hondas. However, I've also heard many people say that Volkswagens continually give issues, which I know Honda and Acura products don't give (my cousin has a 1998 CR-V with over 300,000 miles on it). So, would you buy the Passat or the TSX?

2007 Honda CR-V steering wheel size?

I want to get a steering wheel cover, and I was wondering if anyone knew the size of the crv steering wheel. Or if I measure it, do you measure the diameter of it?