Welcome.
Of the one's that I am familiar with:
Jardines - LOUD, look good, available, 3 into 2 arrangement, a safe bet, great power.
Triumph TORs - Somewhat loud, unfavorable barking sound (at least to me), available, similar to stock 3 into 3 arrangement, a safe bet.
Staintune - Good sound, similar to stock 3 into 3, more expensive, fixed baffle (no repacking), not too loud, good power.
Good luck on your search.