Amplifiers and tone for guitars?

Well for starters your setup is all digital so you won't get a professional sound BUT you can still get it to sound great. If you have a cheap cable it can suck up your sound so invest in something like livewire or planet waves. The speaker doesn't color the sound unless you have super trained dog ears. A bigger amp will only sound good if its cranked up and i don't think you need that kind of volume a 15w can get LOUD. What you have to do is base your sound off of your pedal. Use a clean or slightly distorted amp setting and then use your pedal's EQ to mold the sound to your liking. Then add a little reverb and/or delay from your Vyper to finish it up. A couple of hints would be to cut the mids a little. Too much doesn't sound good. Also use the middle or rhythm on your guitar's toggle switch. Don't just keep it on treble. ( a beginner mistake) Putting the neck/rhythm pickup and putting the guitar's tone knob to 0 yields a great smooth tone. Hope this helped a bit.