CAT Ultimate Mk II Cartridge Matching

Has anyone been able to test a variety of low output cartridges on this preamp? I may purchase one soon, and already have a Shelter 501 mkii cartridge (0.5mv). I read a review on Audio Asylum that said the CAT should use cartridges over 0.5mv to deal with noise issues. I'm concerned about the possibility of not enough gain. Any thoughts or experiences to offer? Thanks.