Does anyone have experience with either the Studio Projects T3 or M-Audio Sputnik? They have been recommended as good tube mics under $700 price range. My converter is pretty clean and detailed so I want to add some warmth and color for acoustic guitar and vocals. One measure for me are the Norah Jones recordings - VERY WARM, SMOOTH but DETAILED and TIGHT. Any advice on other mics in that price range or recommendations for the two mentioned above? Thanks.