I agree with Tartini. The Danzi symphonies are remarkably good - far too good and too original to have been ignored all these centures. The orchestra is a small one and uses modern instruments, so Danzi's wonderful orchestration gets full play. The sound is good, although a little close - at times you can hear someone (conductor Howard Griffiths?) noisily taking a deep breath through his nostrils.
I've been on a bit of a binge these last few months with little-known 18th-century symphonies. It began with the Chandos set of "Mozart's Contemporaries" by Mathias Bamert and the London Mozart Players, and has since expanded to pretty much everything I could find. There's a lot of good stuff from that period (and a lot of faceless trivia as well, as in any period), and to anyone interested in hearing the kind of music that Haydn and Mozart would have been listening to, I would especially recommend music by Carl Friedrich Abel and Joseph Leopold Eybler to begin with.