[jajjguy]

They really will sound different, and you have to try them to know what you like.

That said, I really really like the sound of SD omnis (in my case earthworks qtc) on acoustic sources, especially bowed strings. The super-fast response seems to get a certain magic thing about the bowed string sound that is very hard to capture in any other way. I find this "flattering", compared to the way many other mics seem to miss something about the sound of these instruments.

Placing these mics very close to the source can come close to eliminating the room, assuming the source is not especially loud (i.e., not electric), though you may want to do some gobo-ing. I don't say that it will always work in any room, but it's worked for me in some pretty bad ones.