Any of these are a good choice. I would probably go with a chepo led though, so you don't have to worry about (as much, anyway) excess heat and what to do with it.
If it truly has to be from a local store, go to Lowes and get some CFLs, the twisty lights. Some folks say you can use those led bulbs they have now, but I've never done it so I'm not going to recommend it. The fixtures they go in, I've always just wired them up myself, with pigtail sockets from the electrical department. Wire them in parallel to a power cord, and you're ready to go. I saw a picture the other day of someone with like a six socket star, like the ones they put diodes on, but I couldn't tell you where you could get that.
Best of luck.
