I went ahead and purchased a new Jupiter 846RL flugelhorn. I've had it now for two days. Check out my updated equipment page for pictures and more information.
I recall reading/hearing that some people find cornets to be easier to play, in part because the bell is closer and you can hear yourself more clearly. I never gave it much thought, though, until now. My flugelhorn is only a few inches shorter than my trumpet, but perhaps due to the larger bell, I feel more connected to the sound. My playing seems more centered and precise.
This precision was most noticeable in a jam session I had tonight, with Chuck Mangione; or more precisely, with his recording of "Feels So Good" (oh come on... I bet you did the same thing when you got your first flugelhorn!).
I've never tried playing along to the recording, but when I put it on tonight, I was really close in accuracy. I even managed to punch out some of the higher notes (no, not the high D). And you know what? It felt so good... ;-)
Updated 12/5/05: It's gone...