Look around this site and forum enough and you'll see a common theme; The best anything (kit, knife, firestarter, etc) is the one that you will have with you when you need it. Just about every one has a couple bic lighters stashed in various places, try to get the clear ones so you can see how much fuel you have in it. In the non-lighter category I like the Spark lite, it's small, cheap and about as simple as you can get. My EDC includes a zippo and some matches all the time, and the spark lite is in my back pack kit, which I have with me just about all the time, but it can still get separated.

Hope this helps.

Chris.