Variety is the spice of life!
Adding a tube amp in a second system alongside whatever it is you have now is a very smart way to test the waters.
If you are going to try a tube amp, Audio Research is as good a choice as any.
Not a huge tube amp fan here in that I listen to all genres and my favorite speakers in-house currently are not inherently tube amp friendly but have owned AudioResearch and am a fan.
Matching gear properly is especially important with tube gear due to higher output impedances that are typically found.