Prickstein, you should consider a Sebatron mics pre. They're made in Oz.
http://www.sebatron.com All-tube, hand-built gear. Look at their two-channel vmp-2000e or even the single-channel vmp-1000e. They also have the new Thorax channel strip - with mic pre, EQ and comp. All the units are warm and you can get enough color from them [ depending on how you drive the input and output ] to thicken your voice nicely.
if the U195 is working for you - with the Fat switch on - that's great. If you want to get into a mic with some color and body that will thicken a thinner voice, look into the ADK TT, ADK CE, Peluso 22 47, Blue Blueberry.