Agreed. Particularly for trumpet, a ribbon mic is a must-have, IMO.
Also, if you're talking about attaching a microphone to your horn, you absolutely
do not want to place a microphone anywhere near a trumpet. Back off several feet for the best sound. I know you see a lot of people using clip-on mics at live shows, but that's because minimizing gain to avoid feedback is more important than getting the best sound when you're doing sound reinforcement. For recording, that's entirely the wrong way to do it.
A microphone close to the horn is going to get too much wind noise, valve noise, the musician's breathing, and other undesirable noises. Also, the sound of a brass instrument is complex, with different harmonics radiating in different ways. (My vague recollection is that, because of the curvature of the bell, the position at which the sound wave actually forms varies from one note to another and from one harmonic to another, but this is vague memory and may be entirely wrong.) As a result, the best sound comes a few feet away and off axis, as described in this article:
Recording Brass & Reeds
Personally, I don't put it quite as far away as the author of that article (more like a meter or a little bit over) or that much off axis (more like 15 degrees), but either way, six inches straight in front of the bell is right out.
Ah, yes. This describes how brass instruments produce sound, and my memory was pretty much on target:
http://www.virtualtrumpetstudio.com/How.htm
Fun stuff.