I have a few Avantone mics & they're impressive. Used by some pros.Keep in mind all these mics basically come from the same factory- but the quality control is what sets Avatone apart IMO
Many of these mics discussed may be too bright/shrill. Ribbon mics are a good choice for a armer altenative. If a vocalist likes to hold the mic, consider a sm7, chili peppers & Metallica use them on vox with great results...& I'm sure lots of great vocals used the sm57- which basically can be used on almost any source

No, 11R can't do a "tube" type preamp, but that may not be essential anyway. I would not use any of the 11R fx for vocals in a studio (but live it may be cool). Too many options for fx in the DAW