I'm interested in buying a new trombone with an F attachment for all around playing. I tried the Bach Strad 42b, Yamaha Allegro, and Conn 88HO. I really liked the Bach and Conn, but not so much the Yamaha. I was wondering if these were good for all around playing especially jazz. Also, and other recomMendations for trombones to test would be great.

You might try a Yamaha Xeno.

Those horns are great to blow through and seem to produce a slightly warmer sound than the Bachs.

I am partial to a warmer...some might say >cringe< brighter sound, and have found the Bachs can sometimes sound tubby to me. You might also try the Getzen Eterna Series.

I love the King 2103(3B) or King 2104(4B)--both only come with closed-wrap F Attachments---These have been the standard "Jazz" horns for decades and have been acclaimed for their distinct tone.

Since Bach purchased Conn/King/Benge, Bach has also re-released the discontinued Benge 160F closed-wrap trombones as the "Bach Soloist" and now markets the King line as thier premier "Jazz" Horns.

buy a horn that you feel most comfortable with. Any horn is a jazz horn. I play a Bach 42 and thats what I use for jazz. No horn makes you better at jazz. I don't know you as a player, but any horn can be a jazz horn. Once you get serious about a specific thing you'll want a specific horn.

I'd get a Bach Omega if you can find one. The sound is wonderfully open, and it's a great jazz horn as well.