Wicked Lasers (WL) has a impeccable reputation, known for its high quality, exotic design, and powerful output. But it comes with a hefty price tag.
I got a 180mW Evolution pro. It averages at about 160mW, and max's at 180mW. easily capable of burning most things. And the beam at night time is absolutely unbelievable, more like a neon rope. WL is also completely legal. Because it complies with all FDA laws regarding lasers. The Evolution Pro cost about $530.

If money is no issue I strongly recommend WL.
But
If you dont have $500 to spend on a laser, then I'd go with a $25 50mW laser from
LEDshoppe.com.
Here is a link to a x2 AAA green laser pointer that outputs about 50mW. Not the best quality laser pointer, but it is pretty cost effective. Also, it has a sensitive duty cycle, meaning don't leave it on all the time, give it a 10min grace period for every 20min of use, otherwise it would most likely burn out. Also, dont point at your eyes or anyone else's eye or face area, laser does not have a IR filter.
NOTE: 99% of laser pointers greater than 5mW are illegal in USA. Buy at your own risk. IMO you should be fine with buying a 50mW, just do not point at a plane, helicopter, police officer, or strangers, that will get you in big trouble