Originally Posted by: gogogoPersonally I would recommend restringing all of them at once rather than some at a time when they snap considering that a good set obly cost around 5 bucks also pick up a peg coilers makes things much smoother. Also as far as string brands I absolutely love ernie balls they last pretty long depending on how much you play of course. I play classic rock and blues so my string gauges are thin but they have w/e type you need. Play around with different types before getting hooked on one

I'm with gogogo - restringing at the same time is a good idea, as you get the balance of tone between strings; but in an emergency one at a time won't kill you!
Also, Ernie Balls, for the price, I've yet to find a brand that beat them - "Regular Slinky" is my typical brand, but my co-guitarists goes for the gauge higher (can't remember the name of them now).

If you're happy with Fender's, stick with them - strings, like everything else, are subjective and a matter of personal preference. I've tried Gibson strings and was quite please with them, but I found them hard to get hold of in my area. At least Ernie Ball strings can be found in most "repertable music stores" so even if you're not a massive fan of them, they're not a bad fall back.