Is there any real difference in sound here? I am using a Rode NT1 with a tube 12ax7 preamp, and it sounds pretty good if you ask me. I'm thinking of getting a true tube condenser, but would there be a real difference? I won't be shopping brand name like Neumann or anything. But I did find a guy in california who manufactures custom tube condensers for a very reasonable price. I'm guessing because noones heard of him and he doesn't make alot of sales. The product is T N C.

Any advice here would be appreciated, thanks!