Audiophile stores in Denver metro area

I'm here in Denver for seven weeks and have time to go to several prlaces. I have good gear already. You can see in GerryM5 virtual system. I would like to do some high end system serious auditions. I have a rental car so Boulder, Colorado Springs might be doable also. I'm upgrading my secound system in speakers and amplification areas. SE might even be a possibility. I like tube, SS and analog. So give me any speciality stores and locations. You know about large or small is ok. If they have a web site great. If they have an analog system please note that as I have LPs too.

Thanks,
GerryM5