Much like you can get folding knives for ~$20, but it's worth it to spend more (at least $70 for a spydie endura, iirc), Maglites can be had for cheap, but there are _Much_ better lights out there.
www.flashlightreviews.com has already been mentioned
Another excellent site is
www.candlepowerforums.comThere they discuss everything about flashlights. Literally, everything. Many of those forum-goers also make their own custom lights that you can buy. I've simply not seen such quality lights anywhere else.
However, many of these higher-end lights can run in excess of $200. In the end, you get what you pay for. Those wonders measure in less than 4 inches, output several light levels, run off of a single battery, use LEDs, and are still brighter than Maglites. O_O
However, if you're not up to spending all that money on a single light, the Surefire G2 is an excellent light. It costs around $35, runs off of two lithium batteries (you should purchase these online! Surefire sells them in packs of 12 and prices them many times less than what they go for in stores!), fits in the palm of your hand, and is several times brighter than a 3-D cell maglite. On top of this the batteries have a shelf life of ~10 years (lithiums last much longer than Alkalines, and don't suffer the same low-temperature restrictions as alkalines), and the light is nigh-indestructible. Well, most surefires are nigh-indestructible. (
www.surefire.com ).
In all seriousness, a good light can be as important as a good knife, and at least as useful in everyday life. A good flashlight is definitely not something to forget about.