I have been recording a female vocal. I tried my C-1 but did not it on her. I have been wanting a tube mic anyway so I thought I might bite the bullet and buy one. I thought about the tube mics from SP and also the Groove Tubes GT-66. Any thoughts? Also Guitar Center is selling A Groove Tubes Model 66 for $499. Is this the same or close to the same as the GT-66?

Thanks,
Larrye