I've been to fish den ,44th and Sheridan right? dingy tanks, horrible knowledge (except from one, the owner). and super high prices..
Trust me , or not. see for yourself. while your in the area check out the Reptile stores to the west.. nice 100+ year old tortoise to see.
You will end up , eventually, being a Cichlid keeper at the proper store eventually..
however as I said You need to cultivate a relationship with to get the best.
SO WORTH THE TRIP!! even if the tanks don't hold the awe inspiring fish on that day.. they go fast out of his store.. you will find a true fish keepers base there..
Just saying.
My mom just suggested it to me, she said it was somewhat close by, but she has no sense of direction. After mapping it on google, it doesn't seem like the place you suggested is much further away than fish den is. Mom also suggested todd's tropical fish place which she said was "the best fish store in denver" but when i went in there once, I never wanted to go there again. So I tend to not take her word for things.
She's also one of those "fish keepers" who has pengasius catfish, gbr's, zebra danios, harlequin rasboras, and swordtails in a 15 gallon tank, cause she buys fish impulsively and doesn't listen to me.
but I digress..
I'll try to make it out there, once my tank is finished cycling. I kinda feel like I should just order the fish online, as I'm not a very social person face to face, I like to settle my matters privately without questions. We'll see.
If you can talk Latin names Mark will love you..
I'll take the list to him you posted and ask.
I can sure as hell type latin names, but pronouncing them is a whole different story

I know exactly what I'm looking for and how to care for them, and I'm pretty intent. I haven't looked into the cyprichromis species yet cause I was told they are fragile to new tanks, so I'm going to do research on them later on, probably about 6 months from now or more. That's why I didn't name a specific species yet.