If forced to buy a tube pre-amp, I'd audition McIntosh, Audio Research, plus the Luxman CL-1000, then make a choice.
If compelled to limit my choice of tube preamp to either the Mcintosh C1100 or the Audio Research Ref 6SE, and a total ban on prior auditioning, I would take the McIntosh.
Needless to say, none of these would be suitable as an AV preamplifier/processor (which is where you've asked).