Try a Rico Royal Graftonite B3 mouthpiece with a Rovner Dark ligature. The mouthpiece sells for around $20, and believe it or not, it's a great piece! If you're looking for a warm, dark tone, I think you would be very pleased with it. The Otto Link 6 is fairly dark as far as metal pieces go, but you'll get a warmer sound from a hard rubber or graftonite piece than a metal piece. A lot of players back in the 1940's and 50's really liked the King horns. I pulled up a site with some old ads and here are a few names: Cannonball Adderly Herb Geller Georgie Auld Yep! If it's good enough for Cannonball...

The Zephyr is a great horn. I have a Zephyr Baritone, and a Super 20 tenor. I think the Super 20 and Zephyr are also similar, except that the Super 20 is a little fancier with a couple additional pro features. For tenor, I use a Super Tone Master on my Conn 10M and my Super 20 tenor and it really sounds great on either horn. You can buy the Otto Link 6 gold plated metal for under $120 online through www.giardinelli.com They are part of Musician's Friend, and I have bought from them before. For alto, I like a hard rubber piece best. I never thought I'd admit to liking a Selmer mouthpiece, but my S 80 really sounds good and plays really easy on my 6M and my Selmer SBA. Otto Link also makes a really nice hard rubber piece for alto.