Before you venture out into the user-created forums, you should first explore the free content provided directly by IK Multimedia. The company frequently runs promotions and gives away artist preset packs to celebrate new updates or product releases. These are often the highest quality presets available because they are usually crafted by the very artists whose sounds they emulate.
I can point you toward the exact free presets that will work best for your rig. Share public link amplitube 5 presets list free
Many community-made presets are pre-EQ'd to sit perfectly in a recording mix. Best Sources for Free AmpliTube 5 Presets Before you venture out into the user-created forums,