The problem is, I want some buffer for larger emergencies. The best way I can see to do this, even at the start of a global recession, is either Master Card or Lady Visa (if you don't get the joke, don't worry) with a couple grand for max limit.
If all you want is a buffer of a couple grand, what's the matter with putting a couple of grand in a savings account?
As I've said before, an emergency is the worst time to be getting back into credit card debt.
A rule of thumb I've heard is to keep a reserve of three to six months of expenses as an emergency fund. Buying another car because your old one is wearing out is not an emergency, that should be a seperate savings goal.
Many banks offer a "high interest" savings account with "money market rates" which seems to amount to about 2-3% these days. Put it there and FORGET about it, you're not trying to "build weath". Don't put it in CD's, keep it liquid.