So I got a used Nt6 for $170 and figured I would flip it. It's not selling, so I figure, get an omni capsule and keep it. Now, I don't expect to find another NT6 under $200. Can I do stereo with a NT5 or NT55/O and my NT6? The 6 is 200 ohms vs 100 for the others, and the noise floors are slightly different between the models (very slightly) and allegedly the NT6 goes down to 40hz while the other two, 20hz.