Well, they are all higher than the rate I am earning on my savings. So while I have cash in the bank, I am losing money on my debt's interest rate. So the question is whether or not the risk of having a low savings balance for a while so I can wipe my debt out is worth it.
My father's advice on this issue was that it basically amounted to how many months in the worst possible scenario it would take you to find another job. Add up the monthly expenses you have and the rest of the money after the point you've determined to be how long in the worst-case you would need to live off of your savings. That's better off being used to pay off the high interest rate loans (ie credit cards) as no sane, safe investments are going to give better returns than the rates on those credit cards.
Cut-off points people frequently choose are generally 3 month increments. 3/6/9 months are common (my father recommended 6 as safe amount of time for younger people, like in your 20s when you don't have mortgages or children, said that 3 was something you pretty much only did if you had extremely few expenditures and were very young. Of course this was before the recession hit fully). If you're wondering why I'm referencing my father it's because he's a very talented accountant (ie, tied for second on a 10,000 accountant exam (the CIA), he's a CPA) who takes very cautious stances about money management.
The other option of a cut-off point you can pick involves how long your unemployment benefits would last (or if you would have them at all).