The charismatic image of the young-man-with-a-horn has been around for quite some time (check out Gabriel) and in 1980s Chicago, it finds embodiment in Brad Goode. The youthful trumpeter (who looks about 19 but in fact is 24) brings vigor and a sense of history to his music, and he's serious about its past (the postbop 50s) and its niche in the current jazz scene. Goode's playing is often exhilarating, with a bright, sweet tone and a fluid, classically honed technique; his improvisations are forceful and sometimes even revealing; and he's put together a solid, punchy band that balances his contemporaries with veterans twice his age. In fact, Brad is good enough to raise listeners' expectations to high levels--high enough that you're disappointed when he plays something callow instead of fresh (reminding you that he's still, after all, a couple of years from his prime). This appearance at the Green Mill will double as a record-release celebration for his debut LP, entitled--despite the obvious opportunities for supreme punning (like "Goode Jazz" or "Goode 'n' Plenty" or "The Goode, the Brad, and the Ugly")--Shock of the New. Wednesday, Green Mill, 4802 N. Broadway; 878-5552.