G n' R and metalica both use a wah pedal. You may want to look into some multi-effects pedal. Also, if you don't know which pedal to get yet maybe you should wait until you get a little better and you come across a need for a pedal. Then you'll know which one you need the most. I like digitech
. A Danelectro Pastrami Overdrive was my first effects pedal. It cost about $20 and gave some nice distortion. I now use a digitech RPX400 that has all the effects I know of (including wah) and amp modulators (it can make a 10 watt amp sound like just about any guitarist you want) it cost about $300. If you have a Guitar Center
or another large guiatar store near you, go plug your guiatr into the different effects and play it (to me thats just a fun afternoon anyway).