It's obvious that you play Metal from your set up. The problem with most aspiring metal guitarists is that they read about gear and often don't understand how one piece of gear compliments another (or doesn't as might be the case for you). The most common mistake that newer players make is getting all the DIRTY sounding stuff they can, Metal Distortion, Tube Amp (with the distortion all the way up), the latest Duncan or DiMarzio heavy-metal pickups (like Dimebag Darrell pickups), etc... and when they put it all together they find that it's robbed their guitar of all intelligibility, along with the bell tones and chimes that occur naturally. Basically they are losing all of the sound of the guitar and getting only the sound of their effects. A HUGE tone mistake.

The best most raw and in-your-face tones come from getting a good CLEAN sound from your amp and getting the distortion from using a GOOD overdrive pedal to break up the amp sound (to make it distort). Try turning the distortion down all the way and the level (or output) all the way up. Then dial the distortion up a bit at a time while playing power chords. If you play around long enough you SHOULD be able to get what you are seeking from what you've got. My BEST advice though would be to dump the Metal pedal and replace it with an Ibanez TS-808 Vintage Tubescreamer reissue. This distortion pedal works great for ALL styles of music and has a more...well...MUSICAL tone.

Also...while your 1x12" combo might be fine for practicing, it will NOT be enough for playing onstage. For the type of music you are into you are going to want a head and 4x12" cab. Until you are ready to play in a band however, you are probably good with the Valveking 1x12" combo.